161932800000 has 312 divisors, whose sum is σ = 539803544112. Its totient is φ = 43171840000.

The previous prime is 161932799971. The next prime is 161932800013. The reversal of 161932800000 is 8239161.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38397892 + ... + 38402108.

Almost surely, 2^161932800000 is an apocalyptic number.

161932800000 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 161932800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269901772056).

161932800000 is an abundant number, since it is smaller than the sum of its proper divisors (377870744112).

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

161932800000 is an frugal number, since it uses more digits than its factorization.

161932800000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269 (or 4227 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The spelling of 161932800000 in words is "one hundred sixty-one billion, nine hundred thirty-two million, eight hundred thousand".