172173995712 has 224 divisors, whose sum is σ = 533265075200. Its totient is φ = 54323260416.

The previous prime is 172173995647. The next prime is 172173995713. The reversal of 172173995712 is 217599371271.

172173995712 is a `hidden beast` number, since 17 + 21 + 7 + 39 + 9 + 571 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (172173995713) 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 31 ways as a sum of consecutive naturals, for example, 75085638 + ... + 75087930.

Almost surely, 2^172173995712 is an apocalyptic number.

172173995712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172173995712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266632537600).

172173995712 is an abundant number, since it is smaller than the sum of its proper divisors (361091079488).

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

172173995712 is a wasteful number, since it uses less digits than its factorization.

172173995712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4620 (or 4604 counting only the distinct ones).

The product of its digits is 1666980, while the sum is 54.

The spelling of 172173995712 in words is "one hundred seventy-two billion, one hundred seventy-three million, nine hundred ninety-five thousand, seven hundred twelve".