161006056161 has 4 divisors (see below), whose sum is σ = 214674741552. Its totient is φ = 107337370772.

The previous prime is 161006056087. The next prime is 161006056163. The reversal of 161006056161 is 161650600161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161006056161 - 2²¹ = 161003959009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161006056163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26834342691 + ... + 26834342696.

It is an arithmetic number, because the mean of its divisors is an integer number (53668685388).

Almost surely, 2^161006056161 is an apocalyptic number.

It is an amenable number.

161006056161 is a deficient number, since it is larger than the sum of its proper divisors (53668685391).

161006056161 is an equidigital number, since it uses as much as digits as its factorization.

161006056161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53668685390.

The product of its (nonzero) digits is 6480, while the sum is 33.

The spelling of 161006056161 in words is "one hundred sixty-one billion, six million, fifty-six thousand, one hundred sixty-one".