161209380600 has 192 divisors, whose sum is σ = 573189504000. Its totient is φ = 41602377600.

The previous prime is 161209380593. The next prime is 161209380637. The reversal of 161209380600 is 6083902161.

161209380600 is a `hidden beast` number, since 1 + 6 + 12 + 0 + 9 + 38 + 0 + 600 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 314110 + ... + 648909.

It is an arithmetic number, because the mean of its divisors is an integer number (2985362000).

Almost surely, 2^161209380600 is an apocalyptic number.

161209380600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161209380600 is an abundant number, since it is smaller than the sum of its proper divisors (411980123400).

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

161209380600 is a wasteful number, since it uses less digits than its factorization.

161209380600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963075 (or 963060 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 161209380600 in words is "one hundred sixty-one billion, two hundred nine million, three hundred eighty thousand, six hundred".