57109683978 has 24 divisors (see below), whose sum is σ = 124064148000. Its totient is φ = 18986330664.

The previous prime is 57109683937. The next prime is 57109683989. The reversal of 57109683978 is 87938690175.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4178878 + ... + 4192521.

It is an arithmetic number, because the mean of its divisors is an integer number (5169339500).

Almost surely, 2^57109683978 is an apocalyptic number.

57109683978 is an abundant number, since it is smaller than the sum of its proper divisors (66954464022).

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

57109683978 is a wasteful number, since it uses less digits than its factorization.

57109683978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8371786 (or 8371783 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 57109683978 in words is "fifty-seven billion, one hundred nine million, six hundred eighty-three thousand, nine hundred seventy-eight".