56556006161520 has 40 divisors (see below), whose sum is σ = 175323619101456. Its totient is φ = 15081601643008.

The previous prime is 56556006161419. The next prime is 56556006161533. The reversal of 56556006161520 is 2516160065565.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 56556006161520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117825012597 + ... + 117825013076.

Almost surely, 2^{56556006161520} is an apocalyptic number.

It is an amenable number.

56556006161520 is an abundant number, since it is smaller than the sum of its proper divisors (118767612939936).

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

56556006161520 is a wasteful number, since it uses less digits than its factorization.

56556006161520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235650025689 (or 235650025683 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 48.

The spelling of 56556006161520 in words is "fifty-six trillion, five hundred fifty-six billion, six million, one hundred sixty-one thousand, five hundred twenty".