161901945695159 has 2 divisors, whose sum is σ = 161901945695160. Its totient is φ = 161901945695158.

The previous prime is 161901945695131. The next prime is 161901945695179. The reversal of 161901945695159 is 951596549109161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161901945695159 - 2²⁴ = 161901928917943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161901945695092 and 161901945695101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161901945695179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80950972847579 + 80950972847580.

It is an arithmetic number, because the mean of its divisors is an integer number (80950972847580).

Almost surely, 2^{161901945695159} is an apocalyptic number.

161901945695159 is a deficient number, since it is larger than the sum of its proper divisors (1).

161901945695159 is an equidigital number, since it uses as much as digits as its factorization.

161901945695159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118098000, while the sum is 71.

The spelling of 161901945695159 in words is "one hundred sixty-one trillion, nine hundred one billion, nine hundred forty-five million, six hundred ninety-five thousand, one hundred fifty-nine".