51514864393 has 2 divisors, whose sum is σ = 51514864394. Its totient is φ = 51514864392.

The previous prime is 51514864319. The next prime is 51514864477. The reversal of 51514864393 is 39346841515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42259847184 + 9255017209 = 205572^2 + 96203^2 .

It is a cyclic number.

It is not a de Polignac number, because 51514864393 - 2²⁹ = 50977993481 is a prime.

It is not a weakly prime, because it can be changed into another prime (51514868393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25757432196 + 25757432197.

It is an arithmetic number, because the mean of its divisors is an integer number (25757432197).

Almost surely, 2^51514864393 is an apocalyptic number.

It is an amenable number.

51514864393 is a deficient number, since it is larger than the sum of its proper divisors (1).

51514864393 is an equidigital number, since it uses as much as digits as its factorization.

51514864393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1555200, while the sum is 49.

The spelling of 51514864393 in words is "fifty-one billion, five hundred fourteen million, eight hundred sixty-four thousand, three hundred ninety-three".