172616644 has 12 divisors (see below), whose sum is σ = 303034284. Its totient is φ = 86035424.

The previous prime is 172616597. The next prime is 172616747. The reversal of 172616644 is 446616271.

172616644 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 89113600 + 83503044 = 9440^2 + 9138^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66799 + ... + 69334.

It is an arithmetic number, because the mean of its divisors is an integer number (25252857).

Almost surely, 2^172616644 is an apocalyptic number.

It is an amenable number.

172616644 is a deficient number, since it is larger than the sum of its proper divisors (130417640).

172616644 is a wasteful number, since it uses less digits than its factorization.

172616644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136454 (or 136452 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 172616644 is about 13138.3653473330. The cubic root of 172616644 is about 556.7935849508.

The spelling of 172616644 in words is "one hundred seventy-two million, six hundred sixteen thousand, six hundred forty-four".