51536863515 has 16 divisors (see below), whose sum is σ = 83810769696. Its totient is φ = 27035731200.

The previous prime is 51536863501. The next prime is 51536863523.

51536863515 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51536863515 - 2¹⁰ = 51536862491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28161306 + ... + 28163135.

It is an arithmetic number, because the mean of its divisors is an integer number (5238173106).

Almost surely, 2^51536863515 is an apocalyptic number.

51536863515 is a deficient number, since it is larger than the sum of its proper divisors (32273906181).

51536863515 is a wasteful number, since it uses less digits than its factorization.

51536863515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56324510.

The product of its digits is 1620000, while the sum is 48.

Adding to 51536863515 its product of digits (1620000), we get a palindrome (51538483515).

The spelling of 51536863515 in words is "fifty-one billion, five hundred thirty-six million, eight hundred sixty-three thousand, five hundred fifteen".