161873314320 has 80 divisors (see below), whose sum is σ = 501866128512. Its totient is φ = 43161154560.

The previous prime is 161873314289. The next prime is 161873314321. The reversal of 161873314320 is 23413378161.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (161873314321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2298349 + ... + 2367731.

Almost surely, 2^161873314320 is an apocalyptic number.

161873314320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161873314320 is an abundant number, since it is smaller than the sum of its proper divisors (339992814192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161873314320 is a wasteful number, since it uses less digits than its factorization.

161873314320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79120 (or 79114 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 161873314320 in words is "one hundred sixty-one billion, eight hundred seventy-three million, three hundred fourteen thousand, three hundred twenty".