172191232000 has 416 divisors, whose sum is σ = 462950601984. Its totient is φ = 63700992000.

The previous prime is 172191231967. The next prime is 172191232009. The reversal of 172191232000 is 232191271.

It is a self number, because there is not a number n which added to its sum of digits gives 172191232000.

It is not an unprimeable number, because it can be changed into a prime (172191232009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 635391865 + ... + 635392135.

It is an arithmetic number, because the mean of its divisors is an integer number (1112862024).

Almost surely, 2^172191232000 is an apocalyptic number.

172191232000 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 172191232000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231475300992).

172191232000 is an abundant number, since it is smaller than the sum of its proper divisors (290759369984).

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

172191232000 is an equidigital number, since it uses as much as digits as its factorization.

172191232000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 28.

The spelling of 172191232000 in words is "one hundred seventy-two billion, one hundred ninety-one million, two hundred thirty-two thousand".