163042314631561 has 2 divisors, whose sum is σ = 163042314631562. Its totient is φ = 163042314631560.

The previous prime is 163042314631543. The next prime is 163042314631577. The reversal of 163042314631561 is 165136413240361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129677319884025 + 33364994747536 = 11387595^2 + 5776244^2 .

It is a cyclic number.

It is not a de Polignac number, because 163042314631561 - 2¹³ = 163042314623369 is a prime.

It is not a weakly prime, because it can be changed into another prime (163042314637561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81521157315780 + 81521157315781.

It is an arithmetic number, because the mean of its divisors is an integer number (81521157315781).

Almost surely, 2^{163042314631561} is an apocalyptic number.

It is an amenable number.

163042314631561 is a deficient number, since it is larger than the sum of its proper divisors (1).

163042314631561 is an equidigital number, since it uses as much as digits as its factorization.

163042314631561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 46.

The spelling of 163042314631561 in words is "one hundred sixty-three trillion, forty-two billion, three hundred fourteen million, six hundred thirty-one thousand, five hundred sixty-one".