51597079515 has 32 divisors (see below), whose sum is σ = 91892957760. Its totient is φ = 27468997632.

The previous prime is 51597079511. The next prime is 51597079517.

It is a happy number.

51597079515 is a `hidden beast` number, since 5 + 1 + 59 + 7 + 0 + 79 + 515 = 666.

51597079515 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51597079515 - 2² = 51597079511 is a prime.

It is a super-2 number, since 2×51597079515² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51597079511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 267894 + ... + 418283.

It is an arithmetic number, because the mean of its divisors is an integer number (2871654930).

Almost surely, 2^51597079515 is an apocalyptic number.

51597079515 is a deficient number, since it is larger than the sum of its proper divisors (40295878245).

51597079515 is a wasteful number, since it uses less digits than its factorization.

51597079515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686748 (or 686742 counting only the distinct ones).

The product of its (nonzero) digits is 2480625, while the sum is 54.

The spelling of 51597079515 in words is "fifty-one billion, five hundred ninety-seven million, seventy-nine thousand, five hundred fifteen".