57051991979 has 2 divisors, whose sum is σ = 57051991980. Its totient is φ = 57051991978.

The previous prime is 57051991963. The next prime is 57051992003. The reversal of 57051991979 is 97919915075.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57051991979 - 2⁴ = 57051991963 is a prime.

It is not a weakly prime, because it can be changed into another prime (57051991939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28525995989 + 28525995990.

It is an arithmetic number, because the mean of its divisors is an integer number (28525995990).

Almost surely, 2^57051991979 is an apocalyptic number.

57051991979 is a deficient number, since it is larger than the sum of its proper divisors (1).

57051991979 is an equidigital number, since it uses as much as digits as its factorization.

57051991979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8037225, while the sum is 62.

The spelling of 57051991979 in words is "fifty-seven billion, fifty-one million, nine hundred ninety-one thousand, nine hundred seventy-nine".