57505681887 has 16 divisors (see below), whose sum is σ = 79322029920. Its totient is φ = 37031744000.

The previous prime is 57505681879. The next prime is 57505681889. The reversal of 57505681887 is 78818650575.

It is a cyclic number.

It is not a de Polignac number, because 57505681887 - 2³ = 57505681879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57505681887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57505681889) 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, 2302062 + ... + 2326907.

It is an arithmetic number, because the mean of its divisors is an integer number (4957626870).

Almost surely, 2^57505681887 is an apocalyptic number.

57505681887 is a deficient number, since it is larger than the sum of its proper divisors (21816348033).

57505681887 is a wasteful number, since it uses less digits than its factorization.

57505681887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629114.

The product of its (nonzero) digits is 18816000, while the sum is 60.

The spelling of 57505681887 in words is "fifty-seven billion, five hundred five million, six hundred eighty-one thousand, eight hundred eighty-seven".