217395128945932 has 24 divisors (see below), whose sum is σ = 453694182149376. Its totient is φ = 89118500064528.

The previous prime is 217395128945927. The next prime is 217395128945947. The reversal of 217395128945932 is 239549821593712.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168785037358 + ... + 168785038645.

It is an arithmetic number, because the mean of its divisors is an integer number (18903924256224).

Almost surely, 2^{217395128945932} is an apocalyptic number.

It is an amenable number.

217395128945932 is an abundant number, since it is smaller than the sum of its proper divisors (236299053203444).

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

217395128945932 is a wasteful number, since it uses less digits than its factorization.

217395128945932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337570076037 (or 337570076035 counting only the distinct ones).

The product of its digits is 293932800, while the sum is 70.

The spelling of 217395128945932 in words is "two hundred seventeen trillion, three hundred ninety-five billion, one hundred twenty-eight million, nine hundred forty-five thousand, nine hundred thirty-two".