161194352400 has 240 divisors, whose sum is σ = 577865444800. Its totient is φ = 42675517440.

The previous prime is 161194352303. The next prime is 161194352441. The reversal of 161194352400 is 4253491161.

It is a happy number.

161194352400 is a `hidden beast` number, since 1 + 61 + 194 + 3 + 5 + 2 + 400 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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

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, 1447512 + ... + 1554888.

Almost surely, 2^161194352400 is an apocalyptic number.

161194352400 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 161194352400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288932722400).

161194352400 is an abundant number, since it is smaller than the sum of its proper divisors (416671092400).

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

161194352400 is a wasteful number, since it uses less digits than its factorization.

161194352400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107543 (or 107526 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 161194352400 in words is "one hundred sixty-one billion, one hundred ninety-four million, three hundred fifty-two thousand, four hundred".