161092978200 has 1440 divisors, whose sum is σ = 748153454400. Its totient is φ = 31679424000.

The previous prime is 161092978177. The next prime is 161092978229. The reversal of 161092978200 is 2879290161.

161092978200 is a `hidden beast` number, since 1 + 610 + 9 + 2 + 9 + 7 + 8 + 20 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 165903715 + ... + 165904685.

It is an arithmetic number, because the mean of its divisors is an integer number (519551010).

Almost surely, 2^161092978200 is an apocalyptic number.

161092978200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161092978200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374076727200).

161092978200 is an abundant number, since it is smaller than the sum of its proper divisors (587060476200).

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

161092978200 is a wasteful number, since it uses less digits than its factorization.

161092978200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043 (or 1018 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 161092978200 in words is "one hundred sixty-one billion, ninety-two million, nine hundred seventy-eight thousand, two hundred".