172772565 has 64 divisors (see below), whose sum is σ = 329011200. Its totient is φ = 75778560.

The previous prime is 172772543. The next prime is 172772597. The reversal of 172772565 is 565277271.

It is not a de Polignac number, because 172772565 - 2⁷ = 172772437 is a prime.

It is a congruent 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 63 ways as a sum of consecutive naturals, for example, 288136 + ... + 288734.

It is an arithmetic number, because the mean of its divisors is an integer number (5140800).

Almost surely, 2^172772565 is an apocalyptic number.

172772565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172772565 is a deficient number, since it is larger than the sum of its proper divisors (156238635).

172772565 is a wasteful number, since it uses less digits than its factorization.

172772565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722.

The product of its digits is 205800, while the sum is 42.

The square root of 172772565 is about 13144.2978131203. The cubic root of 172772565 is about 556.9611811610.

The spelling of 172772565 in words is "one hundred seventy-two million, seven hundred seventy-two thousand, five hundred sixty-five".