57691044978 has 64 divisors (see below), whose sum is σ = 136321194240. Its totient is φ = 15933542400.

The previous prime is 57691044913. The next prime is 57691044979. The reversal of 57691044978 is 87944019675.

It is not an unprimeable number, because it can be changed into a prime (57691044979) 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, 34018 + ... + 341378.

It is an arithmetic number, because the mean of its divisors is an integer number (2130018660).

Almost surely, 2^57691044978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57691044978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68160597120).

57691044978 is an abundant number, since it is smaller than the sum of its proper divisors (78630149262).

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

57691044978 is a wasteful number, since it uses less digits than its factorization.

57691044978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307523.

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 57691044978 in words is "fifty-seven billion, six hundred ninety-one million, forty-four thousand, nine hundred seventy-eight".