131621641172 has 96 divisors (see below), whose sum is σ = 270156902400. Its totient is φ = 54949789440.

The previous prime is 131621641159. The next prime is 131621641199. The reversal of 131621641172 is 271146126131.

131621641172 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127416368 + ... + 127417400.

It is an arithmetic number, because the mean of its divisors is an integer number (2814134400).

Almost surely, 2^131621641172 is an apocalyptic number.

It is an amenable number.

131621641172 is an abundant number, since it is smaller than the sum of its proper divisors (138535261228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131621641172 is a wasteful number, since it uses less digits than its factorization.

131621641172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821 (or 1819 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The spelling of 131621641172 in words is "one hundred thirty-one billion, six hundred twenty-one million, six hundred forty-one thousand, one hundred seventy-two".