57516112171691 has 2 divisors, whose sum is σ = 57516112171692. Its totient is φ = 57516112171690.

The previous prime is 57516112171603. The next prime is 57516112171723. The reversal of 57516112171691 is 19617121161575.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57516112171691 is a prime.

It is not a weakly prime, because it can be changed into another prime (57516112171891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28758056085845 + 28758056085846.

It is an arithmetic number, because the mean of its divisors is an integer number (28758056085846).

Almost surely, 2^{57516112171691} is an apocalyptic number.

57516112171691 is a deficient number, since it is larger than the sum of its proper divisors (1).

57516112171691 is an equidigital number, since it uses as much as digits as its factorization.

57516112171691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 793800, while the sum is 53.

The spelling of 57516112171691 in words is "fifty-seven trillion, five hundred sixteen billion, one hundred twelve million, one hundred seventy-one thousand, six hundred ninety-one".