50161605161 has 2 divisors, whose sum is σ = 50161605162. Its totient is φ = 50161605160.

The previous prime is 50161605113. The next prime is 50161605173. The reversal of 50161605161 is 16150616105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38831067136 + 11330538025 = 197056^2 + 106445^2 .

It is a cyclic number.

It is not a de Polignac number, because 50161605161 - 2³⁰ = 49087863337 is a prime.

It is not a weakly prime, because it can be changed into another prime (50161605181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25080802580 + 25080802581.

It is an arithmetic number, because the mean of its divisors is an integer number (25080802581).

Almost surely, 2^50161605161 is an apocalyptic number.

It is an amenable number.

50161605161 is a deficient number, since it is larger than the sum of its proper divisors (1).

50161605161 is an equidigital number, since it uses as much as digits as its factorization.

50161605161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 50161605161 in words is "fifty billion, one hundred sixty-one million, six hundred five thousand, one hundred sixty-one".