172274451328 has 128 divisors (see below), whose sum is σ = 409569200640. Its totient is φ = 70572902400.

The previous prime is 172274451211. The next prime is 172274451359. The reversal of 172274451328 is 823154472271.

172274451328 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (46).

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, 56278918 + ... + 56281978.

It is an arithmetic number, because the mean of its divisors is an integer number (3199759380).

Almost surely, 2^172274451328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172274451328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204784600320).

172274451328 is an abundant number, since it is smaller than the sum of its proper divisors (237294749312).

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

172274451328 is a wasteful number, since it uses less digits than its factorization.

172274451328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5836 (or 5824 counting only the distinct ones).

The product of its digits is 752640, while the sum is 46.

It can be divided in two parts, 17227 and 4451328, that added together give a triangular number (4468555 = T₂₉₈₉).

The spelling of 172274451328 in words is "one hundred seventy-two billion, two hundred seventy-four million, four hundred fifty-one thousand, three hundred twenty-eight".