50515611161 has 4 divisors (see below), whose sum is σ = 50539887924. Its totient is φ = 50491334400.

The previous prime is 50515611131. The next prime is 50515611173. The reversal of 50515611161 is 16111651505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16111651505 = 5 ⋅3222330301.

It can be written as a sum of positive squares in 2 ways, for example, as 37198451161 + 13317160000 = 192869^2 + 115400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50515611161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50515611101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12135260 + ... + 12139421.

It is an arithmetic number, because the mean of its divisors is an integer number (12634971981).

Almost surely, 2^50515611161 is an apocalyptic number.

It is an amenable number.

50515611161 is a deficient number, since it is larger than the sum of its proper divisors (24276763).

50515611161 is a wasteful number, since it uses less digits than its factorization.

50515611161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24276762.

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 50515611161 in words is "fifty billion, five hundred fifteen million, six hundred eleven thousand, one hundred sixty-one".