57791888640 has 144 divisors (see below), whose sum is σ = 205081060800. Its totient is φ = 15411161088.

The previous prime is 57791888621. The next prime is 57791888647. The reversal of 57791888640 is 4688819775.

57791888640 is a `hidden beast` number, since 577 + 9 + 18 + 8 + 8 + 6 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×57791888640² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57791888647) 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, 801550 + ... + 870669.

Almost surely, 2^57791888640 is an apocalyptic number.

It is an amenable number.

57791888640 is an abundant number, since it is smaller than the sum of its proper divisors (147289172160).

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

57791888640 is a wasteful number, since it uses less digits than its factorization.

57791888640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672249 (or 1672229 counting only the distinct ones).

The product of its (nonzero) digits is 27095040, while the sum is 63.

The spelling of 57791888640 in words is "fifty-seven billion, seven hundred ninety-one million, eight hundred eighty-eight thousand, six hundred forty".