51508680515 has 16 divisors (see below), whose sum is σ = 65400736800. Its totient is φ = 38835873792.

The previous prime is 51508680493. The next prime is 51508680557.

51508680515 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-51508680515 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 15 ways as a sum of consecutive naturals, for example, 1386320 + ... + 1422989.

It is an arithmetic number, because the mean of its divisors is an integer number (4087546050).

Almost surely, 2^51508680515 is an apocalyptic number.

51508680515 is a deficient number, since it is larger than the sum of its proper divisors (13892056285).

51508680515 is a wasteful number, since it uses less digits than its factorization.

51508680515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2809526.

The product of its (nonzero) digits is 240000, while the sum is 44.

The spelling of 51508680515 in words is "fifty-one billion, five hundred eight million, six hundred eighty thousand, five hundred fifteen".