8173123272 has 96 divisors (see below), whose sum is σ = 22356079200. Its totient is φ = 2697345792.

The previous prime is 8173123261. The next prime is 8173123279. The reversal of 8173123272 is 2723213718.

8173123272 is a `hidden beast` number, since 8 + 17 + 312 + 327 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (8173123279) 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, 4572763 + ... + 4574549.

It is an arithmetic number, because the mean of its divisors is an integer number (232875825).

Almost surely, 2^8173123272 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 8173123272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11178039600).

8173123272 is an abundant number, since it is smaller than the sum of its proper divisors (14182955928).

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

8173123272 is a wasteful number, since it uses less digits than its factorization.

8173123272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2395 (or 2388 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 8173123272 is about 90405.3276748666. The cubic root of 8173123272 is about 2014.3241044312.

The spelling of 8173123272 in words is "eight billion, one hundred seventy-three million, one hundred twenty-three thousand, two hundred seventy-two".