51165050165 has 24 divisors (see below), whose sum is σ = 62682453288. Its totient is φ = 40092965120.

The previous prime is 51165050147. The next prime is 51165050207. The reversal of 51165050165 is 56105056115.

It can be written as a sum of positive squares in 12 ways, for example, as 46553329 + 51118496836 = 6823^2 + 226094^2 .

It is not a de Polignac number, because 51165050165 - 2¹⁴ = 51165033781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9505775 + ... + 9511155.

It is an arithmetic number, because the mean of its divisors is an integer number (2611768887).

Almost surely, 2^51165050165 is an apocalyptic number.

It is an amenable number.

51165050165 is a deficient number, since it is larger than the sum of its proper divisors (11517403123).

51165050165 is an equidigital number, since it uses as much as digits as its factorization.

51165050165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6169 (or 6116 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 51165050165 in words is "fifty-one billion, one hundred sixty-five million, fifty thousand, one hundred sixty-five".