| Base | Representation |
|---|---|
| bin | 110011011011011… |
| … | …0011001110101000 |
| 3 | 11110021002200022100 |
| 4 | 1212312303032220 |
| 5 | 12013231013030 |
| 6 | 443122253400 |
| 7 | 60522466122 |
| oct | 14666631650 |
| 9 | 4407080270 |
| 10 | 1725641640 |
| 11 | 806097118 |
| 12 | 401ab7260 |
| 13 | 216686838 |
| 14 | 12527c212 |
| 15 | a176b360 |
| hex | 66db33a8 |
1725641640 has 96 divisors (see below), whose sum is σ = 5666267880. Its totient is φ = 455417856.
The previous prime is 1725641623. The next prime is 1725641641. The reversal of 1725641640 is 461465271.
1725641640 is a `hidden beast` number, since 1 + 7 + 2 + 5 + 6 + 4 + 1 + 640 = 666.
It can be written as a sum of positive squares in 4 ways, for example, as 1654374276 + 71267364 = 40674^2 + 8442^2 .
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a junction number, because it is equal to n+sod(n) for n = 1725641595 and 1725641604.
It is not an unprimeable number, because it can be changed into a prime (1725641641) 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 23 ways as a sum of consecutive naturals, for example, 10212 + ... + 59628.
Almost surely, 21725641640 is an apocalyptic number.
1725641640 is a gapful number since it is divisible by the number (10) 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 1725641640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2833133940).
1725641640 is an abundant number, since it is smaller than the sum of its proper divisors (3940626240).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1725641640 is a wasteful number, since it uses less digits than its factorization.
1725641640 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 49531 (or 49524 counting only the distinct ones).
The product of its (nonzero) digits is 40320, while the sum is 36.
The square root of 1725641640 is about 41540.8430342958. The cubic root of 1725641640 is about 1199.4538347907.
The spelling of 1725641640 in words is "one billion, seven hundred twenty-five million, six hundred forty-one thousand, six hundred forty".
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