172147827744 has 60 divisors (see below), whose sum is σ = 506281987134. Its totient is φ = 57382608384.

The previous prime is 172147827707. The next prime is 172147827763. The reversal of 172147827744 is 447728741271.

It can be written as a sum of positive squares in only one way, i.e., 172142010000 + 5817744 = 414900^2 + 2412^2 .

It is a super-2 number, since 2×172147827744² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 33204937 + ... + 33210120.

Almost surely, 2^172147827744 is an apocalyptic number.

It is an amenable number.

172147827744 is an abundant number, since it is smaller than the sum of its proper divisors (334134159390).

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

172147827744 is an equidigital number, since it uses as much as digits as its factorization.

172147827744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66415079 (or 66415062 counting only the distinct ones).

The product of its digits is 4917248, while the sum is 54.

The spelling of 172147827744 in words is "one hundred seventy-two billion, one hundred forty-seven million, eight hundred twenty-seven thousand, seven hundred forty-four".