57161338640 has 40 divisors (see below), whose sum is σ = 151885844160. Its totient is φ = 19598173056.

The previous prime is 57161338613. The next prime is 57161338657. The reversal of 57161338640 is 4683316175.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 57161338591 and 57161338600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51036350 + ... + 51037469.

It is an arithmetic number, because the mean of its divisors is an integer number (3797146104).

Almost surely, 2^57161338640 is an apocalyptic number.

It is an amenable number.

57161338640 is an abundant number, since it is smaller than the sum of its proper divisors (94724505520).

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

57161338640 is a wasteful number, since it uses less digits than its factorization.

57161338640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102073839 (or 102073833 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 57161338640 in words is "fifty-seven billion, one hundred sixty-one million, three hundred thirty-eight thousand, six hundred forty".