331618412837161 has 2 divisors, whose sum is σ = 331618412837162. Its totient is φ = 331618412837160.

The previous prime is 331618412837143. The next prime is 331618412837177. The reversal of 331618412837161 is 161738214816133.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 258547715377561 + 73070697459600 = 16079419^2 + 8548140^2 .

It is a cyclic number.

It is not a de Polignac number, because 331618412837161 - 2²³ = 331618404448553 is a prime.

It is not a weakly prime, because it can be changed into another prime (331618412837461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165809206418580 + 165809206418581.

It is an arithmetic number, because the mean of its divisors is an integer number (165809206418581).

Almost surely, 2^{331618412837161} is an apocalyptic number.

It is an amenable number.

331618412837161 is a deficient number, since it is larger than the sum of its proper divisors (1).

331618412837161 is an equidigital number, since it uses as much as digits as its factorization.

331618412837161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 55.

The spelling of 331618412837161 in words is "three hundred thirty-one trillion, six hundred eighteen billion, four hundred twelve million, eight hundred thirty-seven thousand, one hundred sixty-one".