15656496128 has 352 divisors, whose sum is σ = 41817753600. Its totient is φ = 5685313536.

The previous prime is 15656496127. The next prime is 15656496139. The reversal of 15656496128 is 82169465651.

It is a self number, because there is not a number n which added to its sum of digits gives 15656496128.

It is not an unprimeable number, because it can be changed into a prime (15656496127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65508233 + ... + 65508471.

Almost surely, 2^15656496128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15656496128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20908876800).

15656496128 is an abundant number, since it is smaller than the sum of its proper divisors (26161257472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15656496128 is a wasteful number, since it uses less digits than its factorization.

15656496128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 317 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 53.

The spelling of 15656496128 in words is "fifteen billion, six hundred fifty-six million, four hundred ninety-six thousand, one hundred twenty-eight".