57378831621 has 32 divisors (see below), whose sum is σ = 79092842496. Its totient is φ = 36972936000.

The previous prime is 57378831583. The next prime is 57378831637. The reversal of 57378831621 is 12613887375.

57378831621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 57378831621 - 2⁷ = 57378831493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57378831421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21008826 + ... + 21011556.

It is an arithmetic number, because the mean of its divisors is an integer number (2471651328).

Almost surely, 2^57378831621 is an apocalyptic number.

It is an amenable number.

57378831621 is a deficient number, since it is larger than the sum of its proper divisors (21714010875).

57378831621 is a wasteful number, since it uses less digits than its factorization.

57378831621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3953.

The product of its digits is 1693440, while the sum is 51.

The spelling of 57378831621 in words is "fifty-seven billion, three hundred seventy-eight million, eight hundred thirty-one thousand, six hundred twenty-one".