57731078879 has 2 divisors, whose sum is σ = 57731078880. Its totient is φ = 57731078878.

The previous prime is 57731078857. The next prime is 57731078887. The reversal of 57731078879 is 97887013775.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57731078879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57731078479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28865539439 + 28865539440.

It is an arithmetic number, because the mean of its divisors is an integer number (28865539440).

Almost surely, 2^57731078879 is an apocalyptic number.

57731078879 is a deficient number, since it is larger than the sum of its proper divisors (1).

57731078879 is an equidigital number, since it uses as much as digits as its factorization.

57731078879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20744640, while the sum is 62.

The spelling of 57731078879 in words is "fifty-seven billion, seven hundred thirty-one million, seventy-eight thousand, eight hundred seventy-nine".