172798520544 has 576 divisors, whose sum is σ = 580484136960. Its totient is φ = 48283361280.

The previous prime is 172798520539. The next prime is 172798520593. The reversal of 172798520544 is 445025897271.

172798520544 is a `hidden beast` number, since 1 + 7 + 2 + 7 + 98 + 5 + 2 + 0 + 544 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 280062124 + ... + 280062740.

It is an arithmetic number, because the mean of its divisors is an integer number (1007784960).

Almost surely, 2^172798520544 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 172798520544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290242068480).

172798520544 is an abundant number, since it is smaller than the sum of its proper divisors (407685616416).

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

172798520544 is a wasteful number, since it uses less digits than its factorization.

172798520544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 54.

The spelling of 172798520544 in words is "one hundred seventy-two billion, seven hundred ninety-eight million, five hundred twenty thousand, five hundred forty-four".