56997571217940 has 60 divisors (see below), whose sum is σ = 178803491936916. Its totient is φ = 15199352324352.

The previous prime is 56997571217927. The next prime is 56997571217987. The reversal of 56997571217940 is 4971217579965.

56997571217940 is a `hidden beast` number, since 5 + 6 + 9 + 9 + 7 + 571 + 2 + 1 + 7 + 9 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 29651553464976 + 27346017752964 = 5445324^2 + 5229342^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17591841349 + ... + 17591844588.

Almost surely, 2^{56997571217940} is an apocalyptic number.

It is an amenable number.

56997571217940 is an abundant number, since it is smaller than the sum of its proper divisors (121805920718976).

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

56997571217940 is a wasteful number, since it uses less digits than its factorization.

56997571217940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35183685958 (or 35183685947 counting only the distinct ones).

The product of its (nonzero) digits is 300056400, while the sum is 72.

The spelling of 56997571217940 in words is "fifty-six trillion, nine hundred ninety-seven billion, five hundred seventy-one million, two hundred seventeen thousand, nine hundred forty".