51561095597 has 24 divisors (see below), whose sum is σ = 58090914336. Its totient is φ = 45716220000.

The previous prime is 51561095561. The next prime is 51561095609. The reversal of 51561095597 is 79559016515.

It is not a de Polignac number, because 51561095597 - 2⁶ = 51561095533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51561095297) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 787322 + ... + 850292.

It is an arithmetic number, because the mean of its divisors is an integer number (2420454764).

Almost surely, 2^51561095597 is an apocalyptic number.

It is an amenable number.

51561095597 is a deficient number, since it is larger than the sum of its proper divisors (6529818739).

51561095597 is a wasteful number, since it uses less digits than its factorization.

51561095597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63161 (or 63150 counting only the distinct ones).

The product of its (nonzero) digits is 2126250, while the sum is 53.

The spelling of 51561095597 in words is "fifty-one billion, five hundred sixty-one million, ninety-five thousand, five hundred ninety-seven".