172849734528 has 192 divisors, whose sum is σ = 481570364160. Its totient is φ = 54917913600.

The previous prime is 172849734523. The next prime is 172849734557. The reversal of 172849734528 is 825437948271.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172849734523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24721113 + ... + 24728103.

It is an arithmetic number, because the mean of its divisors is an integer number (2508178980).

Almost surely, 2^172849734528 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 172849734528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240785182080).

172849734528 is an abundant number, since it is smaller than the sum of its proper divisors (308720629632).

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

172849734528 is an equidigital number, since it uses as much as digits as its factorization.

172849734528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7137 (or 7094 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 60.

The spelling of 172849734528 in words is "one hundred seventy-two billion, eight hundred forty-nine million, seven hundred thirty-four thousand, five hundred twenty-eight".