Base | Representation |
---|---|
bin | 10111010010000111… |
… | …011011101000000000 |
3 | 2101112021220120210221 |
4 | 113102013123220000 |
5 | 402200000000000 |
6 | 15252420432424 |
7 | 1543344331243 |
oct | 272207335000 |
9 | 71467816727 |
10 | 25000000000 |
11 | a669937028 |
12 | 4a18548714 |
13 | 2485536511 |
14 | 12d238725a |
15 | 9b4bc261a |
hex | 5d21dba00 |
25000000000 has 120 divisors (see below), whose sum is σ = 62438964588. Its totient is φ = 10000000000.
The previous prime is 24999999991. The next prime is 25000000013. The reversal of 25000000000 is 52.
It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.
It can be written as a sum of positive squares in 6 ways, for example, as 3749357824 + 21250642176 = 61232^2 + 145776^2 .
It is a sliding number, since 25000000000 = 5000000000 + 20000000000 and 1/5000000000 + 1/20000000000 = 0.00000000025000000000.
It is a hoax number, since the sum of its digits (7) coincides with the sum of the digits of its distinct prime factors.
It is an enlightened number because it begins with the concatenation of its prime factors (25).
It is a self number, because there is not a number n which added to its sum of digits gives 25000000000.
It is an unprimeable number.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4999999998 + ... + 5000000002.
Almost surely, 225000000000 is an apocalyptic number.
25000000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 25000000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31219482294).
25000000000 is an abundant number, since it is smaller than the sum of its proper divisors (37438964588).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
25000000000 is an frugal number, since it uses more digits than its factorization.
25000000000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 73 (or 7 counting only the distinct ones).
The product of its (nonzero) digits is 10, while the sum is 7.
Multiplying 25000000000 by its product of nonzero digits (10), we get a square (250000000000 = 5000002).
25000000000 divided by its product of nonzero digits (10) gives a square (2500000000 = 500002).
Adding to 25000000000 its reverse (52), we get a palindrome (25000000052).
It can be divided in two parts, 2 and 5000000000, that multiplied together give a 10-th power (10000000000 = 1010).
The spelling of 25000000000 in words is "twenty-five billion", and thus it is an aban number and an uban number.
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