161934858899 has 12 divisors (see below), whose sum is σ = 178269707952. Its totient is φ = 146985904560.

The previous prime is 161934858857. The next prime is 161934858919. The reversal of 161934858899 is 998858439161.

It is a de Polignac number, because none of the positive numbers 2^k-161934858899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161934858499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 955952 + ... + 1112525.

It is an arithmetic number, because the mean of its divisors is an integer number (14855808996).

Almost surely, 2^161934858899 is an apocalyptic number.

161934858899 is a deficient number, since it is larger than the sum of its proper divisors (16334849053).

161934858899 is a wasteful number, since it uses less digits than its factorization.

161934858899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069146 (or 2069135 counting only the distinct ones).

The product of its digits is 134369280, while the sum is 71.

The spelling of 161934858899 in words is "one hundred sixty-one billion, nine hundred thirty-four million, eight hundred fifty-eight thousand, eight hundred ninety-nine".