172472163320 has 64 divisors (see below), whose sum is σ = 409242736800. Its totient is φ = 65236907520.

The previous prime is 172472163317. The next prime is 172472163373. The reversal of 172472163320 is 23361274271.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201422 + ... + 620898.

Almost surely, 2^172472163320 is an apocalyptic number.

172472163320 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 172472163320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204621368400).

172472163320 is an abundant number, since it is smaller than the sum of its proper divisors (236770573480).

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

172472163320 is a wasteful number, since it uses less digits than its factorization.

172472163320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420048 (or 420044 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 38.

The spelling of 172472163320 in words is "one hundred seventy-two billion, four hundred seventy-two million, one hundred sixty-three thousand, three hundred twenty".