172703907072 has 54 divisors (see below), whose sum is σ = 497947947042. Its totient is φ = 57567968256.

The previous prime is 172703907059. The next prime is 172703907073. The reversal of 172703907072 is 270709307271.

It can be written as a sum of positive squares in only one way, i.e., 94312866816 + 78391040256 = 307104^2 + 279984^2 .

It is a super-2 number, since 2×172703907072² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172703907073) 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 5 ways as a sum of consecutive naturals, for example, 37476843 + ... + 37481450.

Almost surely, 2^172703907072 is an apocalyptic number.

172703907072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172703907072 is an abundant number, since it is smaller than the sum of its proper divisors (325244039970).

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

172703907072 is an equidigital number, since it uses as much as digits as its factorization.

172703907072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74958315 (or 74958298 counting only the distinct ones).

The product of its (nonzero) digits is 259308, while the sum is 45.

The spelling of 172703907072 in words is "one hundred seventy-two billion, seven hundred three million, nine hundred seven thousand, seventy-two".