161005685200 has 60 divisors (see below), whose sum is σ = 386947188160. Its totient is φ = 64380458880.

The previous prime is 161005685179. The next prime is 161005685213. The reversal of 161005685200 is 2586500161.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1140937 + ... + 1274263.

Almost surely, 2^161005685200 is an apocalyptic number.

161005685200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161005685200 is an abundant number, since it is smaller than the sum of its proper divisors (225941502960).

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

161005685200 is a wasteful number, since it uses less digits than its factorization.

161005685200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136364 (or 136353 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 161005685200 in words is "one hundred sixty-one billion, five million, six hundred eighty-five thousand, two hundred".