Base | Representation |
---|---|
bin | 100101010011111010… |
… | …0100111100101000000 |
3 | 21122211001022201202121 |
4 | 1022213310213211000 |
5 | 2303044000000000 |
6 | 100450420454024 |
7 | 5534400156043 |
oct | 1124764474500 |
9 | 248731281677 |
10 | 80125000000 |
11 | 30a87523471 |
12 | 1364184a314 |
13 | 772bcbc806 |
14 | 3c415d6c5a |
15 | 213e460b1a |
hex | 12a7d27940 |
80125000000 has 140 divisors (see below), whose sum is σ = 199057596804. Its totient is φ = 32000000000.
The previous prime is 80124999979. The next prime is 80125000001. The reversal of 80125000000 is 52108.
It is a happy number.
It can be written as a sum of positive squares in 10 ways, for example, as 11073773824 + 69051226176 = 105232^2 + 262776^2 .
It is a sliding number, since 80125000000 = 125000000 + 80000000000 and 1/125000000 + 1/80000000000 = 0.0000000080125000000.
It is a Harshad number since it is a multiple of its sum of digits (16).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (80125000001) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 124999680 + ... + 125000320.
Almost surely, 280125000000 is an apocalyptic number.
80125000000 is a gapful number since it is divisible by the number (80) 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 80125000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99528798402).
80125000000 is an abundant number, since it is smaller than the sum of its proper divisors (118932596804).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
80125000000 is an frugal number, since it uses more digits than its factorization.
80125000000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 698 (or 648 counting only the distinct ones).
The product of its (nonzero) digits is 80, while the sum is 16.
Adding to 80125000000 its reverse (52108), we get a palindrome (80125052108).
It can be divided in two parts, 80 and 125000000, that multiplied together give a 10-th power (10000000000 = 1010).
The spelling of 80125000000 in words is "eighty billion, one hundred twenty-five million", and thus it is an aban number.
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