56513061645564 has 48 divisors (see below), whose sum is σ = 138806009888000. Its totient is φ = 17845973001216.

The previous prime is 56513061645559. The next prime is 56513061645571. The reversal of 56513061645564 is 46554616031565.

It is a super-2 number, since 2×56513061645564² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14404329 + ... + 17902815.

Almost surely, 2^{56513061645564} is an apocalyptic number.

It is an amenable number.

56513061645564 is an abundant number, since it is smaller than the sum of its proper divisors (82292948242436).

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

56513061645564 is a wasteful number, since it uses less digits than its factorization.

56513061645564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569362 (or 3569360 counting only the distinct ones).

The product of its (nonzero) digits is 38880000, while the sum is 57.

The spelling of 56513061645564 in words is "fifty-six trillion, five hundred thirteen billion, sixty-one million, six hundred forty-five thousand, five hundred sixty-four".