12207656257 has 4 divisors (see below), whose sum is σ = 12212158660. Its totient is φ = 12203153856.

The previous prime is 12207656239. The next prime is 12207656267. The reversal of 12207656257 is 75265670221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8934786576 + 3272869681 = 94524^2 + 57209^2 .

It is a cyclic number.

It is not a de Polignac number, because 12207656257 - 2¹⁹ = 12207131969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12207656207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2247132 + ... + 2252557.

It is an arithmetic number, because the mean of its divisors is an integer number (3053039665).

Almost surely, 2^12207656257 is an apocalyptic number.

It is an amenable number.

12207656257 is a deficient number, since it is larger than the sum of its proper divisors (4502403).

12207656257 is an equidigital number, since it uses as much as digits as its factorization.

12207656257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4502402.

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 12207656257 in words is "twelve billion, two hundred seven million, six hundred fifty-six thousand, two hundred fifty-seven".