57044287491 has 32 divisors (see below), whose sum is σ = 82477232640. Its totient is φ = 34929882624.

The previous prime is 57044287477. The next prime is 57044287501. The reversal of 57044287491 is 19478244075.

It is not a de Polignac number, because 57044287491 - 2⁵ = 57044287459 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (57044287451) 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, 2671405 + ... + 2692673.

It is an arithmetic number, because the mean of its divisors is an integer number (2577413520).

Almost surely, 2^57044287491 is an apocalyptic number.

57044287491 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

57044287491 is a deficient number, since it is larger than the sum of its proper divisors (25432945149).

57044287491 is a wasteful number, since it uses less digits than its factorization.

57044287491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22555.

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 57044287491 in words is "fifty-seven billion, forty-four million, two hundred eighty-seven thousand, four hundred ninety-one".