172001765844 has 96 divisors (see below), whose sum is σ = 472371863040. Its totient is φ = 53937321984.

The previous prime is 172001765843. The next prime is 172001765863. The reversal of 172001765844 is 448567100271.

It is a self number, because there is not a number n which added to its sum of digits gives 172001765844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172001765843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4355532 + ... + 4394844.

It is an arithmetic number, because the mean of its divisors is an integer number (4920540240).

Almost surely, 2^172001765844 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 172001765844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236185931520).

172001765844 is an abundant number, since it is smaller than the sum of its proper divisors (300370097196).

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

172001765844 is a wasteful number, since it uses less digits than its factorization.

172001765844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41726 (or 41718 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 172001765844 in words is "one hundred seventy-two billion, one million, seven hundred sixty-five thousand, eight hundred forty-four".