172943866689 has 16 divisors (see below), whose sum is σ = 251764227264. Its totient is φ = 104727168000.

The previous prime is 172943866621. The next prime is 172943866721. The reversal of 172943866689 is 986668349271.

It is not a de Polignac number, because 172943866689 - 2⁷ = 172943866561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172943866189) 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, 2142184 + ... + 2221449.

It is an arithmetic number, because the mean of its divisors is an integer number (15735264204).

Almost surely, 2^172943866689 is an apocalyptic number.

It is an amenable number.

172943866689 is a deficient number, since it is larger than the sum of its proper divisors (78820360575).

172943866689 is a wasteful number, since it uses less digits than its factorization.

172943866689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4364848.

The product of its digits is 188116992, while the sum is 69.

The spelling of 172943866689 in words is "one hundred seventy-two billion, nine hundred forty-three million, eight hundred sixty-six thousand, six hundred eighty-nine".