172117065086 has 4 divisors (see below), whose sum is σ = 258175597632. Its totient is φ = 86058532542.

The previous prime is 172117064989. The next prime is 172117065089. The reversal of 172117065086 is 680560711271.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172117065089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43029266270 + ... + 43029266273.

It is an arithmetic number, because the mean of its divisors is an integer number (64543899408).

Almost surely, 2^172117065086 is an apocalyptic number.

172117065086 is a deficient number, since it is larger than the sum of its proper divisors (86058532546).

172117065086 is an equidigital number, since it uses as much as digits as its factorization.

172117065086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86058532545.

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 172117065086 in words is "one hundred seventy-two billion, one hundred seventeen million, sixty-five thousand, eighty-six".