2172885557706 has 40 divisors (see below), whose sum is σ = 5125129685280. Its totient is φ = 686174385672.

The previous prime is 2172885557677. The next prime is 2172885557707. The reversal of 2172885557706 is 6077555882712.

2172885557706 is a `hidden beast` number, since 2 + 1 + 7 + 2 + 8 + 8 + 5 + 557 + 70 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (2172885557707) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 352967286 + ... + 352973441.

It is an arithmetic number, because the mean of its divisors is an integer number (128128242132).

Almost surely, 2^{2172885557706} is an apocalyptic number.

2172885557706 is an abundant number, since it is smaller than the sum of its proper divisors (2952244127574).

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

2172885557706 is a wasteful number, since it uses less digits than its factorization.

2172885557706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705940760 (or 705940751 counting only the distinct ones).

The product of its (nonzero) digits is 65856000, while the sum is 63.

The spelling of 2172885557706 in words is "two trillion, one hundred seventy-two billion, eight hundred eighty-five million, five hundred fifty-seven thousand, seven hundred six".