172956656 has 10 divisors (see below), whose sum is σ = 335103552. Its totient is φ = 86478320.

The previous prime is 172956643. The next prime is 172956659. The reversal of 172956656 is 656659271.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 172956656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172956659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5404880 + ... + 5404911.

Almost surely, 2^172956656 is an apocalyptic number.

172956656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

172956656 is a deficient number, since it is larger than the sum of its proper divisors (162146896).

172956656 is a wasteful number, since it uses less digits than its factorization.

172956656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10809799 (or 10809793 counting only the distinct ones).

The product of its digits is 680400, while the sum is 47.

The square root of 172956656 is about 13151.2986430999. The cubic root of 172956656 is about 557.1589269589.

It can be divided in two parts, 1729 and 56656, that added together give a palindrome (58385).

The spelling of 172956656 in words is "one hundred seventy-two million, nine hundred fifty-six thousand, six hundred fifty-six".