51968686915 has 4 divisors (see below), whose sum is σ = 62362424304. Its totient is φ = 41574949528.

The previous prime is 51968686883. The next prime is 51968686937.

51968686915 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51968686915 - 2⁵ = 51968686883 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 5196868687 + ... + 5196868696.

It is an arithmetic number, because the mean of its divisors is an integer number (15590606076).

Almost surely, 2^51968686915 is an apocalyptic number.

51968686915 is a deficient number, since it is larger than the sum of its proper divisors (10393737389).

51968686915 is a wasteful number, since it uses less digits than its factorization.

51968686915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10393737388.

The product of its digits is 27993600, while the sum is 64.

The spelling of 51968686915 in words is "fifty-one billion, nine hundred sixty-eight million, six hundred eighty-six thousand, nine hundred fifteen".