57516818 has 4 divisors (see below), whose sum is σ = 86275230. Its totient is φ = 28758408.

The previous prime is 57516787. The next prime is 57516827. The reversal of 57516818 is 81861575.

57516818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 49603849 + 7912969 = 7043^2 + 2813^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14379203 + ... + 14379206.

Almost surely, 2^57516818 is an apocalyptic number.

57516818 is a deficient number, since it is larger than the sum of its proper divisors (28758412).

57516818 is a wasteful number, since it uses less digits than its factorization.

57516818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28758411.

The product of its digits is 67200, while the sum is 41.

The square root of 57516818 is about 7583.9843090555. The cubic root of 57516818 is about 386.0097584045.

The spelling of 57516818 in words is "fifty-seven million, five hundred sixteen thousand, eight hundred eighteen".