51145631715 has 32 divisors (see below), whose sum is σ = 82477866240. Its totient is φ = 27062987904.

The previous prime is 51145631683. The next prime is 51145631791. The reversal of 51145631715 is 51713654115.

It is a Cunningham number, because it is equal to 226154²-1.

It is not a de Polignac number, because 51145631715 - 2⁵ = 51145631683 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3384757 + ... + 3399833.

It is an arithmetic number, because the mean of its divisors is an integer number (2577433320).

Almost surely, 2^51145631715 is an apocalyptic number.

51145631715 is a deficient number, since it is larger than the sum of its proper divisors (31332234525).

51145631715 is a wasteful number, since it uses less digits than its factorization.

51145631715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16851.

The product of its digits is 63000, while the sum is 39.

The spelling of 51145631715 in words is "fifty-one billion, one hundred forty-five million, six hundred thirty-one thousand, seven hundred fifteen".