51415606515 has 64 divisors (see below), whose sum is σ = 101299516416. Its totient is φ = 21685473792.

The previous prime is 51415606493. The next prime is 51415606591. The reversal of 51415606515 is 51560651415.

It is not a de Polignac number, because 51415606515 - 2⁵ = 51415606483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3121732 + ... + 3138158.

It is an arithmetic number, because the mean of its divisors is an integer number (1582804944).

Almost surely, 2^51415606515 is an apocalyptic number.

51415606515 is a deficient number, since it is larger than the sum of its proper divisors (49883909901).

51415606515 is a wasteful number, since it uses less digits than its factorization.

51415606515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18748.

The product of its (nonzero) digits is 90000, while the sum is 39.

The spelling of 51415606515 in words is "fifty-one billion, four hundred fifteen million, six hundred six thousand, five hundred fifteen".