22217688657 has 12 divisors (see below), whose sum is σ = 32140776564. Its totient is φ = 14789380320.

The previous prime is 22217688653. The next prime is 22217688679. The reversal of 22217688657 is 75688671222.

It can be written as a sum of positive squares in 2 ways, for example, as 6841936656 + 15375752001 = 82716^2 + 123999^2 .

It is not a de Polignac number, because 22217688657 - 2² = 22217688653 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (22217688653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1861398 + ... + 1873295.

It is an arithmetic number, because the mean of its divisors is an integer number (2678398047).

Almost surely, 2^22217688657 is an apocalyptic number.

It is an amenable number.

22217688657 is a deficient number, since it is larger than the sum of its proper divisors (9923087907).

22217688657 is a wasteful number, since it uses less digits than its factorization.

22217688657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3735360 (or 3735357 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The spelling of 22217688657 in words is "twenty-two billion, two hundred seventeen million, six hundred eighty-eight thousand, six hundred fifty-seven".