50516051661 has 12 divisors (see below), whose sum is σ = 74747329020. Its totient is φ = 32855968320.

The previous prime is 50516051653. The next prime is 50516051669. The reversal of 50516051661 is 16615061505.

It is an interprime number because it is at equal distance from previous prime (50516051653) and next prime (50516051669).

It can be written as a sum of positive squares in 2 ways, for example, as 19189175625 + 31326876036 = 138525^2 + 176994^2 .

It is not a de Polignac number, because 50516051661 - 2³ = 50516051653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50516051669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68449566 + ... + 68450303.

It is an arithmetic number, because the mean of its divisors is an integer number (6228944085).

Almost surely, 2^50516051661 is an apocalyptic number.

It is an amenable number.

50516051661 is a deficient number, since it is larger than the sum of its proper divisors (24231277359).

50516051661 is a wasteful number, since it uses less digits than its factorization.

50516051661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136899916 (or 136899913 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 50516051661 in words is "fifty billion, five hundred sixteen million, fifty-one thousand, six hundred sixty-one".