51916795884691 has 2 divisors, whose sum is σ = 51916795884692. Its totient is φ = 51916795884690.

The previous prime is 51916795884649. The next prime is 51916795884739. The reversal of 51916795884691 is 19648859761915.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51916795884691 - 2⁹ = 51916795884179 is a prime.

It is not a weakly prime, because it can be changed into another prime (51916795884631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25958397942345 + 25958397942346.

It is an arithmetic number, because the mean of its divisors is an integer number (25958397942346).

Almost surely, 2^{51916795884691} is an apocalyptic number.

51916795884691 is a deficient number, since it is larger than the sum of its proper divisors (1).

51916795884691 is an equidigital number, since it uses as much as digits as its factorization.

51916795884691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1175731200, while the sum is 79.

The spelling of 51916795884691 in words is "fifty-one trillion, nine hundred sixteen billion, seven hundred ninety-five million, eight hundred eighty-four thousand, six hundred ninety-one".