172642655 has 8 divisors (see below), whose sum is σ = 214315200. Its totient is φ = 133351456.

The previous prime is 172642619. The next prime is 172642661. The reversal of 172642655 is 556246271.

172642655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172642655 - 2¹⁰ = 172641631 is a prime.

It is a congruent number.

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, 595175 + ... + 595464.

It is an arithmetic number, because the mean of its divisors is an integer number (26789400).

Almost surely, 2^172642655 is an apocalyptic number.

172642655 is a deficient number, since it is larger than the sum of its proper divisors (41672545).

172642655 is a wasteful number, since it uses less digits than its factorization.

172642655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1190673.

The product of its digits is 100800, while the sum is 38.

The square root of 172642655 is about 13139.3551972690. The cubic root of 172642655 is about 556.8215506406.

The spelling of 172642655 in words is "one hundred seventy-two million, six hundred forty-two thousand, six hundred fifty-five".