161312711788 has 24 divisors (see below), whose sum is σ = 283723818560. Its totient is φ = 80249719680.

The previous prime is 161312711773. The next prime is 161312711797. The reversal of 161312711788 is 887117213161.

It is a happy number.

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, 558253 + ... + 796411.

Almost surely, 2^161312711788 is an apocalyptic number.

It is an amenable number.

161312711788 is a deficient number, since it is larger than the sum of its proper divisors (122411106772).

161312711788 is a wasteful number, since it uses less digits than its factorization.

161312711788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239017 (or 239015 counting only the distinct ones).

The product of its digits is 112896, while the sum is 46.

The spelling of 161312711788 in words is "one hundred sixty-one billion, three hundred twelve million, seven hundred eleven thousand, seven hundred eighty-eight".