172555746213206 has 4 divisors (see below), whose sum is σ = 258833619319812. Its totient is φ = 86277873106602.

The previous prime is 172555746213181. The next prime is 172555746213239. The reversal of 172555746213206 is 602312647555271.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43138936553300 + ... + 43138936553303.

It is an arithmetic number, because the mean of its divisors is an integer number (64708404829953).

Almost surely, 2^{172555746213206} is an apocalyptic number.

172555746213206 is a deficient number, since it is larger than the sum of its proper divisors (86277873106606).

172555746213206 is an equidigital number, since it uses as much as digits as its factorization.

172555746213206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86277873106605.

The product of its (nonzero) digits is 21168000, while the sum is 56.

The spelling of 172555746213206 in words is "one hundred seventy-two trillion, five hundred fifty-five billion, seven hundred forty-six million, two hundred thirteen thousand, two hundred six".