172317508256 has 48 divisors (see below), whose sum is σ = 343985292000. Its totient is φ = 84964493568.

The previous prime is 172317508219. The next prime is 172317508283. The reversal of 172317508256 is 652805713271.

It is a self number, because there is not a number n which added to its sum of digits gives 172317508256.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532751 + ... + 792753.

It is an arithmetic number, because the mean of its divisors is an integer number (7166360250).

Almost surely, 2^172317508256 is an apocalyptic number.

172317508256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

172317508256 is a deficient number, since it is larger than the sum of its proper divisors (171667783744).

172317508256 is a wasteful number, since it uses less digits than its factorization.

172317508256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260301 (or 260293 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 47.

The spelling of 172317508256 in words is "one hundred seventy-two billion, three hundred seventeen million, five hundred eight thousand, two hundred fifty-six".