57661764 has 24 divisors (see below), whose sum is σ = 135051840. Its totient is φ = 19148064.

The previous prime is 57661757. The next prime is 57661771. The reversal of 57661764 is 46716675.

It is an interprime number because it is at equal distance from previous prime (57661757) and next prime (57661771).

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, 5704 + ... + 12159.

It is an arithmetic number, because the mean of its divisors is an integer number (5627160).

Almost surely, 2^57661764 is an apocalyptic number.

It is an amenable number.

57661764 is an abundant number, since it is smaller than the sum of its proper divisors (77390076).

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

57661764 is a wasteful number, since it uses less digits than its factorization.

57661764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18139 (or 18137 counting only the distinct ones).

The product of its digits is 211680, while the sum is 42.

The square root of 57661764 is about 7593.5343549628. The cubic root of 57661764 is about 386.3337426954. Note that the first 3 decimals are identical.

The spelling of 57661764 in words is "fifty-seven million, six hundred sixty-one thousand, seven hundred sixty-four".