51597948613 has 2 divisors, whose sum is σ = 51597948614. Its totient is φ = 51597948612.

The previous prime is 51597948607. The next prime is 51597948629. The reversal of 51597948613 is 31684979515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33422055489 + 18175893124 = 182817^2 + 134818^2 .

It is a cyclic number.

It is not a de Polignac number, because 51597948613 - 2⁵ = 51597948581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51597948643) 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, 25798974306 + 25798974307.

It is an arithmetic number, because the mean of its divisors is an integer number (25798974307).

Almost surely, 2^51597948613 is an apocalyptic number.

It is an amenable number.

51597948613 is a deficient number, since it is larger than the sum of its proper divisors (1).

51597948613 is an equidigital number, since it uses as much as digits as its factorization.

51597948613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8164800, while the sum is 58.

The spelling of 51597948613 in words is "fifty-one billion, five hundred ninety-seven million, nine hundred forty-eight thousand, six hundred thirteen".