165121923376 has 20 divisors (see below), whose sum is σ = 319971451072. Its totient is φ = 82548645696.

The previous prime is 165121923371. The next prime is 165121923377. The reversal of 165121923376 is 673329121561.

It is not an unprimeable number, because it can be changed into a prime (165121923371) 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, 658656 + ... + 874111.

Almost surely, 2^165121923376 is an apocalyptic number.

165121923376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165121923376 is a deficient number, since it is larger than the sum of its proper divisors (154849527696).

165121923376 is a wasteful number, since it uses less digits than its factorization.

165121923376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539508 (or 1539502 counting only the distinct ones).

The product of its digits is 408240, while the sum is 46.

The spelling of 165121923376 in words is "one hundred sixty-five billion, one hundred twenty-one million, nine hundred twenty-three thousand, three hundred seventy-six".