172866355984 has 135 divisors (see below), whose sum is σ = 403426514151. Its totient is φ = 71546045760.

The previous prime is 172866355973. The next prime is 172866356053. The reversal of 172866355984 is 489553668271.

The square root of 172866355984 is 415772.

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

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 360889857 + ... + 360890335.

Almost surely, 2^172866355984 is an apocalyptic number.

172866355984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

172866355984 is the 415772-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172866355984

172866355984 is an abundant number, since it is smaller than the sum of its proper divisors (230560158167).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172866355984 is an frugal number, since it uses more digits than its factorization.

172866355984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042 (or 519 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 64.

Multiplying 172866355984 by its sum of digits (64), we get a square (11063446782976 = 3326176²).

The spelling of 172866355984 in words is "one hundred seventy-two billion, eight hundred sixty-six million, three hundred fifty-five thousand, nine hundred eighty-four".