161500566597067 has 2 divisors, whose sum is σ = 161500566597068. Its totient is φ = 161500566597066.

The previous prime is 161500566597031. The next prime is 161500566597191. The reversal of 161500566597067 is 760795665005161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161500566597067 - 2²³ = 161500558208459 is a prime.

It is a super-2 number, since 2×161500566597067² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161500516597067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80750283298533 + 80750283298534.

It is an arithmetic number, because the mean of its divisors is an integer number (80750283298534).

Almost surely, 2^{161500566597067} is an apocalyptic number.

161500566597067 is a deficient number, since it is larger than the sum of its proper divisors (1).

161500566597067 is an equidigital number, since it uses as much as digits as its factorization.

161500566597067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71442000, while the sum is 64.

The spelling of 161500566597067 in words is "one hundred sixty-one trillion, five hundred billion, five hundred sixty-six million, five hundred ninety-seven thousand, sixty-seven".