172722911972 has 12 divisors (see below), whose sum is σ = 325516257276. Its totient is φ = 79718267040.

The previous prime is 172722911971. The next prime is 172722911993. The reversal of 172722911972 is 279119227271.

172722911972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 90958940836 + 81763971136 = 301594^2 + 285944^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 172722911972.

It is not an unprimeable number, because it can be changed into a prime (172722911971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1660797179 + ... + 1660797282.

It is an arithmetic number, because the mean of its divisors is an integer number (27126354773).

Almost surely, 2^172722911972 is an apocalyptic number.

It is an amenable number.

172722911972 is a deficient number, since it is larger than the sum of its proper divisors (152793345304).

172722911972 is a wasteful number, since it uses less digits than its factorization.

172722911972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3321594478 (or 3321594476 counting only the distinct ones).

The product of its digits is 444528, while the sum is 50.

The spelling of 172722911972 in words is "one hundred seventy-two billion, seven hundred twenty-two million, nine hundred eleven thousand, nine hundred seventy-two".