57216465638 has 8 divisors (see below), whose sum is σ = 85827415080. Its totient is φ = 28607327280.

The previous prime is 57216465619. The next prime is 57216465763. The reversal of 57216465638 is 83656461275.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 57216465638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370823 + ... + 501938.

It is an arithmetic number, because the mean of its divisors is an integer number (10728426885).

Almost surely, 2^57216465638 is an apocalyptic number.

57216465638 is a deficient number, since it is larger than the sum of its proper divisors (28610949442).

57216465638 is a wasteful number, since it uses less digits than its factorization.

57216465638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905542.

The product of its digits is 7257600, while the sum is 53.

The spelling of 57216465638 in words is "fifty-seven billion, two hundred sixteen million, four hundred sixty-five thousand, six hundred thirty-eight".