172442528644 has 27 divisors (see below), whose sum is σ = 303116046597. Its totient is φ = 85839638544.

The previous prime is 172442528633. The next prime is 172442528707. The reversal of 172442528644 is 446825244271.

The square root of 172442528644 is 415262.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 115566002500 + 56876526144 = 339950^2 + 238488^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 329717767 + ... + 329718289.

Almost surely, 2^172442528644 is an apocalyptic number.

172442528644 is the 415262-nd square number.

It is an amenable number.

172442528644 is a deficient number, since it is larger than the sum of its proper divisors (130673517953).

172442528644 is an frugal number, since it uses more digits than its factorization.

172442528644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844 (or 922 counting only the distinct ones).

The product of its digits is 3440640, while the sum is 49.

Multiplying 172442528644 by its sum of digits (49), we get a square (8449683903556 = 2906834²).

The spelling of 172442528644 in words is "one hundred seventy-two billion, four hundred forty-two million, five hundred twenty-eight thousand, six hundred forty-four".