56717643780 has 144 divisors (see below), whose sum is σ = 203401336320. Its totient is φ = 12516989184.

The previous prime is 56717643757. The next prime is 56717643811. The reversal of 56717643780 is 8734671765.

56717643780 is a `hidden beast` number, since 5 + 67 + 1 + 76 + 437 + 80 = 666.

It is a super-2 number, since 2×56717643780² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 739564 + ... + 812643.

It is an arithmetic number, because the mean of its divisors is an integer number (1412509280).

Almost surely, 2^56717643780 is an apocalyptic number.

It is an amenable number.

56717643780 is an abundant number, since it is smaller than the sum of its proper divisors (146683692540).

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

56717643780 is a wasteful number, since it uses less digits than its factorization.

56717643780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552258 (or 1552253 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 54.

The spelling of 56717643780 in words is "fifty-six billion, seven hundred seventeen million, six hundred forty-three thousand, seven hundred eighty".