119904031561 has 2 divisors, whose sum is σ = 119904031562. Its totient is φ = 119904031560.

The previous prime is 119904031523. The next prime is 119904031573. The reversal of 119904031561 is 165130409911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93770075961 + 26133955600 = 306219^2 + 161660^2 .

It is a cyclic number.

It is not a de Polignac number, because 119904031561 - 2²³ = 119895642953 is a prime.

It is not a weakly prime, because it can be changed into another prime (119904031361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59952015780 + 59952015781.

It is an arithmetic number, because the mean of its divisors is an integer number (59952015781).

Almost surely, 2^119904031561 is an apocalyptic number.

It is an amenable number.

119904031561 is a deficient number, since it is larger than the sum of its proper divisors (1).

119904031561 is an equidigital number, since it uses as much as digits as its factorization.

119904031561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 40.

The spelling of 119904031561 in words is "one hundred nineteen billion, nine hundred four million, thirty-one thousand, five hundred sixty-one".