51505606016515 has 16 divisors (see below), whose sum is σ = 71261359328448. Its totient is φ = 35005580015616.

The previous prime is 51505606016489. The next prime is 51505606016519. The reversal of 51505606016515 is 51561060650515.

It is a happy number.

51505606016515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51505606016515 - 2⁹ = 51505606016003 is a prime.

It is a super-2 number, since 2×51505606016515² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51505606016519) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6511450662 + ... + 6511458571.

It is an arithmetic number, because the mean of its divisors is an integer number (4453834958028).

Almost surely, 2^{51505606016515} is an apocalyptic number.

51505606016515 is a deficient number, since it is larger than the sum of its proper divisors (19755753311933).

51505606016515 is a wasteful number, since it uses less digits than its factorization.

51505606016515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13022909358.

The product of its (nonzero) digits is 675000, while the sum is 46.

The spelling of 51505606016515 in words is "fifty-one trillion, five hundred five billion, six hundred six million, sixteen thousand, five hundred fifteen".