57216565620 has 48 divisors (see below), whose sum is σ = 178007094720. Its totient is φ = 15257750688.

The previous prime is 57216565583. The next prime is 57216565621. The reversal of 57216565620 is 2656561275.

57216565620 is a `hidden beast` number, since 5 + 7 + 2 + 16 + 5 + 6 + 5 + 620 = 666.

57216565620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57216565621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52977762 + ... + 52978841.

It is an arithmetic number, because the mean of its divisors is an integer number (3708481140).

Almost surely, 2^57216565620 is an apocalyptic number.

It is an amenable number.

57216565620 is an abundant number, since it is smaller than the sum of its proper divisors (120790529100).

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

57216565620 is a wasteful number, since it uses less digits than its factorization.

57216565620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105956621 (or 105956613 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 57216565620 in words is "fifty-seven billion, two hundred sixteen million, five hundred sixty-five thousand, six hundred twenty".