161380322500 has 60 divisors (see below), whose sum is σ = 352998066960. Its totient is φ = 64535380000.

The previous prime is 161380322473. The next prime is 161380322513. The reversal of 161380322500 is 5223083161.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15022131 + ... + 15032869.

It is an arithmetic number, because the mean of its divisors is an integer number (5883301116).

Almost surely, 2^161380322500 is an apocalyptic number.

161380322500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161380322500 is an abundant number, since it is smaller than the sum of its proper divisors (191617744460).

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

161380322500 is a wasteful number, since it uses less digits than its factorization.

161380322500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16774 (or 16757 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 161380322500 in words is "one hundred sixty-one billion, three hundred eighty million, three hundred twenty-two thousand, five hundred".