72173545345330 has 32 divisors (see below), whose sum is σ = 152624336453568. Its totient is φ = 24226085150400.

The previous prime is 72173545345229. The next prime is 72173545345333. The reversal of 72173545345330 is 3354354537127.

It is not an unprimeable number, because it can be changed into a prime (72173545345333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25235503936 + ... + 25235506795.

It is an arithmetic number, because the mean of its divisors is an integer number (4769510514174).

Almost surely, 2^{72173545345330} is an apocalyptic number.

72173545345330 is an abundant number, since it is smaller than the sum of its proper divisors (80450791108238).

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

72173545345330 is a wasteful number, since it uses less digits than its factorization.

72173545345330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50471010762.

The product of its (nonzero) digits is 15876000, while the sum is 52.

The spelling of 72173545345330 in words is "seventy-two trillion, one hundred seventy-three billion, five hundred forty-five million, three hundred forty-five thousand, three hundred thirty".