57161980 has 24 divisors (see below), whose sum is σ = 120318912. Its totient is φ = 22811712.

The previous prime is 57161977. The next prime is 57161999. The reversal of 57161980 is 8916175.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6174 + ... + 12346.

It is an arithmetic number, because the mean of its divisors is an integer number (5013288).

Almost surely, 2^57161980 is an apocalyptic number.

It is an amenable number.

57161980 is an abundant number, since it is smaller than the sum of its proper divisors (63156932).

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

57161980 is a wasteful number, since it uses less digits than its factorization.

57161980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6645 (or 6643 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 57161980 is about 7560.5542124900. The cubic root of 57161980 is about 385.2143181838.

The spelling of 57161980 in words is "fifty-seven million, one hundred sixty-one thousand, nine hundred eighty".