51016505701505 has 4 divisors (see below), whose sum is σ = 61219806841812. Its totient is φ = 40813204561200.

The previous prime is 51016505701487. The next prime is 51016505701543. The reversal of 51016505701505 is 50510750561015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14087050705984 + 36929454995521 = 3753272^2 + 6076961^2 .

It is not a de Polignac number, because 51016505701505 - 2³² = 51012210734209 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5101650570146 + ... + 5101650570155.

It is an arithmetic number, because the mean of its divisors is an integer number (15304951710453).

Almost surely, 2^{51016505701505} is an apocalyptic number.

It is an amenable number.

51016505701505 is a deficient number, since it is larger than the sum of its proper divisors (10203301140307).

51016505701505 is a wasteful number, since it uses less digits than its factorization.

51016505701505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10203301140306.

The product of its (nonzero) digits is 131250, while the sum is 41.

The spelling of 51016505701505 in words is "fifty-one trillion, sixteen billion, five hundred five million, seven hundred one thousand, five hundred five".