57731403640 has 64 divisors (see below), whose sum is σ = 139193782560. Its totient is φ = 21472296960.

The previous prime is 57731403599. The next prime is 57731403649. The reversal of 57731403640 is 4630413775.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 57731403593 and 57731403602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57731403649) 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, 455001 + ... + 567880.

Almost surely, 2^57731403640 is an apocalyptic number.

It is an amenable number.

57731403640 is an abundant number, since it is smaller than the sum of its proper divisors (81462378920).

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

57731403640 is a wasteful number, since it uses less digits than its factorization.

57731403640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022992 (or 1022988 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 40.

The spelling of 57731403640 in words is "fifty-seven billion, seven hundred thirty-one million, four hundred three thousand, six hundred forty".