172680855 has 16 divisors (see below), whose sum is σ = 279140064. Its totient is φ = 91146240.

The previous prime is 172680853. The next prime is 172680863. The reversal of 172680855 is 558086271.

It is not a de Polignac number, because 172680855 - 2¹ = 172680853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172680853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57886 + ... + 60795.

It is an arithmetic number, because the mean of its divisors is an integer number (17446254).

Almost surely, 2^172680855 is an apocalyptic number.

172680855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

172680855 is a deficient number, since it is larger than the sum of its proper divisors (106459209).

172680855 is a wasteful number, since it uses less digits than its factorization.

172680855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118786.

The product of its (nonzero) digits is 134400, while the sum is 42.

The square root of 172680855 is about 13140.8087650647. The cubic root of 172680855 is about 556.8626162251.

The spelling of 172680855 in words is "one hundred seventy-two million, six hundred eighty thousand, eight hundred fifty-five".