12207656258 has 18 divisors (see below), whose sum is σ = 21303023193. Its totient is φ = 5231383920.

The previous prime is 12207656239. The next prime is 12207656267. The reversal of 12207656258 is 85265670221.

It can be written as a sum of positive squares in 2 ways, for example, as 7877095009 + 4330561249 = 88753^2 + 65807^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=78127.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1088198 + ... + 1099358.

Almost surely, 2^12207656258 is an apocalyptic number.

12207656258 is a deficient number, since it is larger than the sum of its proper divisors (9095366935).

12207656258 is an frugal number, since it uses more digits than its factorization.

12207656258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22338 (or 11170 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 12207656258 in words is "twelve billion, two hundred seven million, six hundred fifty-six thousand, two hundred fifty-eight".