161237123756 has 24 divisors (see below), whose sum is σ = 282451424640. Its totient is φ = 80536764672.

The previous prime is 161237123717. The next prime is 161237123777. The reversal of 161237123756 is 657321732161.

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, 23306810 + ... + 23313726.

It is an arithmetic number, because the mean of its divisors is an integer number (11768809360).

Almost surely, 2^161237123756 is an apocalyptic number.

It is an amenable number.

161237123756 is a deficient number, since it is larger than the sum of its proper divisors (121214300884).

161237123756 is a wasteful number, since it uses less digits than its factorization.

161237123756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11993 (or 11991 counting only the distinct ones).

The product of its digits is 317520, while the sum is 44.

The spelling of 161237123756 in words is "one hundred sixty-one billion, two hundred thirty-seven million, one hundred twenty-three thousand, seven hundred fifty-six".