51609090615 has 16 divisors (see below), whose sum is σ = 86164743168. Its totient is φ = 26328115616.

The previous prime is 51609090571. The next prime is 51609090623.

51609090615 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 51609090615 - 2⁸ = 51609090359 is a prime.

It is a congruent number.

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, 74795439 + ... + 74796128.

It is an arithmetic number, because the mean of its divisors is an integer number (5385296448).

Almost surely, 2^51609090615 is an apocalyptic number.

51609090615 is a deficient number, since it is larger than the sum of its proper divisors (34555652553).

51609090615 is a wasteful number, since it uses less digits than its factorization.

51609090615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149591598.

The product of its (nonzero) digits is 72900, while the sum is 42.

The spelling of 51609090615 in words is "fifty-one billion, six hundred nine million, ninety thousand, six hundred fifteen".