51085938165 has 32 divisors (see below), whose sum is σ = 82534247040. Its totient is φ = 26981247744.

The previous prime is 51085938157. The next prime is 51085938203. The reversal of 51085938165 is 56183958015.

It is a happy number.

It is not a de Polignac number, because 51085938165 - 2³ = 51085938157 is a prime.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 796887 + ... + 858603.

It is an arithmetic number, because the mean of its divisors is an integer number (2579195220).

Almost surely, 2^51085938165 is an apocalyptic number.

It is an amenable number.

51085938165 is a deficient number, since it is larger than the sum of its proper divisors (31448308875).

51085938165 is a wasteful number, since it uses less digits than its factorization.

51085938165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62261.

The product of its (nonzero) digits is 1296000, while the sum is 51.

The spelling of 51085938165 in words is "fifty-one billion, eighty-five million, nine hundred thirty-eight thousand, one hundred sixty-five".