56515574772 has 48 divisors (see below), whose sum is σ = 147340468800. Its totient is φ = 18733275360.

The previous prime is 56515574761. The next prime is 56515574783. The reversal of 56515574772 is 27747551565.

56515574772 is a `hidden beast` number, since 5 + 6 + 515 + 57 + 4 + 7 + 72 = 666.

It is an interprime number because it is at equal distance from previous prime (56515574761) and next prime (56515574783).

It is a super-3 number, since 3×56515574772³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 1442379 + ... + 1481042.

It is an arithmetic number, because the mean of its divisors is an integer number (3069593100).

Almost surely, 2^56515574772 is an apocalyptic number.

It is an amenable number.

56515574772 is an abundant number, since it is smaller than the sum of its proper divisors (90824894028).

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

56515574772 is a wasteful number, since it uses less digits than its factorization.

56515574772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2923613 (or 2923605 counting only the distinct ones).

The product of its digits is 10290000, while the sum is 54.

The spelling of 56515574772 in words is "fifty-six billion, five hundred fifteen million, five hundred seventy-four thousand, seven hundred seventy-two".