15623872056 has 128 divisors (see below), whose sum is σ = 47396966400. Its totient is φ = 4739575680.

The previous prime is 15623872037. The next prime is 15623872079. The reversal of 15623872056 is 65027832651.

15623872056 is a `hidden beast` number, since 1 + 5 + 62 + 387 + 205 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160185 + ... + 238551.

It is an arithmetic number, because the mean of its divisors is an integer number (370288800).

Almost surely, 2^15623872056 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 15623872056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23698483200).

15623872056 is an abundant number, since it is smaller than the sum of its proper divisors (31773094344).

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

15623872056 is a wasteful number, since it uses less digits than its factorization.

15623872056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78466 (or 78456 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 15623872056 in words is "fifteen billion, six hundred twenty-three million, eight hundred seventy-two thousand, fifty-six".