57665586640 has 40 divisors (see below), whose sum is σ = 134972332200. Its totient is φ = 22911422976.

The previous prime is 57665586617. The next prime is 57665586659. The reversal of 57665586640 is 4668556675.

It can be written as a sum of positive squares in 4 ways, for example, as 12085044624 + 45580542016 = 109932^2 + 213496^2 .

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

It is a hoax number, since the sum of its digits (58) 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, 2406939 + ... + 2430778.

It is an arithmetic number, because the mean of its divisors is an integer number (3374308305).

Almost surely, 2^57665586640 is an apocalyptic number.

It is an amenable number.

57665586640 is an abundant number, since it is smaller than the sum of its proper divisors (77306745560).

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

57665586640 is a wasteful number, since it uses less digits than its factorization.

57665586640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4837879 (or 4837873 counting only the distinct ones).

The product of its (nonzero) digits is 36288000, while the sum is 58.

The spelling of 57665586640 in words is "fifty-seven billion, six hundred sixty-five million, five hundred eighty-six thousand, six hundred forty".