161749682122 has 16 divisors (see below), whose sum is σ = 277468716672. Its totient is φ = 69275405520.

The previous prime is 161749682093. The next prime is 161749682161. The reversal of 161749682122 is 221286947161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3801993 + ... + 3844300.

It is an arithmetic number, because the mean of its divisors is an integer number (17341794792).

Almost surely, 2^161749682122 is an apocalyptic number.

161749682122 is a deficient number, since it is larger than the sum of its proper divisors (115719034550).

161749682122 is a wasteful number, since it uses less digits than its factorization.

161749682122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7647813.

The product of its digits is 580608, while the sum is 49.

The spelling of 161749682122 in words is "one hundred sixty-one billion, seven hundred forty-nine million, six hundred eighty-two thousand, one hundred twenty-two".