57912799991 has 2 divisors, whose sum is σ = 57912799992. Its totient is φ = 57912799990.

The previous prime is 57912799961. The next prime is 57912799993. The reversal of 57912799991 is 19999721975.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57912799991 is a prime.

It is a Sophie Germain prime.

Together with 57912799993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57912799993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28956399995 + 28956399996.

It is an arithmetic number, because the mean of its divisors is an integer number (28956399996).

Almost surely, 2^57912799991 is an apocalyptic number.

57912799991 is a deficient number, since it is larger than the sum of its proper divisors (1).

57912799991 is an equidigital number, since it uses as much as digits as its factorization.

57912799991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28934010, while the sum is 68.

The spelling of 57912799991 in words is "fifty-seven billion, nine hundred twelve million, seven hundred ninety-nine thousand, nine hundred ninety-one".