51604795165 has 24 divisors (see below), whose sum is σ = 78584820192. Its totient is φ = 32169221280.

The previous prime is 51604795163. The next prime is 51604795199. The reversal of 51604795165 is 56159740615.

51604795165 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 51604795165 - 2¹ = 51604795163 is a prime.

It is a super-3 number, since 3×51604795165³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51604795163) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9571479 + ... + 9576868.

It is an arithmetic number, because the mean of its divisors is an integer number (3274367508).

Almost surely, 2^51604795165 is an apocalyptic number.

51604795165 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51604795165 is a deficient number, since it is larger than the sum of its proper divisors (26980025027).

51604795165 is a wasteful number, since it uses less digits than its factorization.

51604795165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19148377 (or 19148370 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 49.

The spelling of 51604795165 in words is "fifty-one billion, six hundred four million, seven hundred ninety-five thousand, one hundred sixty-five".