172218805941 has 36 divisors (see below), whose sum is σ = 289242784512. Its totient is φ = 90840675744.

The previous prime is 172218805937. The next prime is 172218805963. The reversal of 172218805941 is 149508812271.

It is a happy number.

It is not a de Polignac number, because 172218805941 - 2² = 172218805937 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172218805981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3441301 + ... + 3490986.

It is an arithmetic number, because the mean of its divisors is an integer number (8034521792).

Almost surely, 2^172218805941 is an apocalyptic number.

It is an amenable number.

172218805941 is a deficient number, since it is larger than the sum of its proper divisors (117023978571).

172218805941 is a wasteful number, since it uses less digits than its factorization.

172218805941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6932330 (or 6932310 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 48.

The spelling of 172218805941 in words is "one hundred seventy-two billion, two hundred eighteen million, eight hundred five thousand, nine hundred forty-one".