51511510606515 has 48 divisors (see below), whose sum is σ = 86988712796928. Its totient is φ = 26025618249792.

The previous prime is 51511510606487. The next prime is 51511510606529. The reversal of 51511510606515 is 51560601511515.

It is not a de Polignac number, because 51511510606515 - 2²³ = 51511502217907 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 118170592 + ... + 118605698.

It is an arithmetic number, because the mean of its divisors is an integer number (1812264849936).

Almost surely, 2^{51511510606515} is an apocalyptic number.

51511510606515 is a deficient number, since it is larger than the sum of its proper divisors (35477202190413).

51511510606515 is a wasteful number, since it uses less digits than its factorization.

51511510606515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457016 (or 456997 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 42.

The spelling of 51511510606515 in words is "fifty-one trillion, five hundred eleven billion, five hundred ten million, six hundred six thousand, five hundred fifteen".