56556546520 has 32 divisors (see below), whose sum is σ = 129151522800. Its totient is φ = 22284966528.

The previous prime is 56556546481. The next prime is 56556546559. The reversal of 56556546520 is 2564565565.

It is an interprime number because it is at equal distance from previous prime (56556546481) and next prime (56556546559).

It is a super-2 number, since 2×56556546520² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

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, 10548915 + ... + 10554274.

Almost surely, 2^56556546520 is an apocalyptic number.

It is an amenable number.

56556546520 is an abundant number, since it is smaller than the sum of its proper divisors (72594976280).

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

56556546520 is a wasteful number, since it uses less digits than its factorization.

56556546520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21103267 (or 21103263 counting only the distinct ones).

The product of its (nonzero) digits is 5400000, while the sum is 49.

The spelling of 56556546520 in words is "fifty-six billion, five hundred fifty-six million, five hundred forty-six thousand, five hundred twenty".