51100364708561 has 8 divisors (see below), whose sum is σ = 59592262051200. Its totient is φ = 43800312607044.

The previous prime is 51100364708507. The next prime is 51100364708573. The reversal of 51100364708561 is 16580746300115.

It is a happy number.

It is not a de Polignac number, because 51100364708561 - 2³⁴ = 51083184839377 is a prime.

It is a super-2 number, since 2×51100364708561² (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 (51100364708501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74490327221 + ... + 74490327906.

It is an arithmetic number, because the mean of its divisors is an integer number (7449032756400).

Almost surely, 2^{51100364708561} is an apocalyptic number.

It is an amenable number.

51100364708561 is a deficient number, since it is larger than the sum of its proper divisors (8491897342639).

51100364708561 is an equidigital number, since it uses as much as digits as its factorization.

51100364708561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148980655148 (or 148980655134 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 51100364708561 in words is "fifty-one trillion, one hundred billion, three hundred sixty-four million, seven hundred eight thousand, five hundred sixty-one".