12764243209 has 2 divisors, whose sum is σ = 12764243210. Its totient is φ = 12764243208.

The previous prime is 12764243197. The next prime is 12764243213. The reversal of 12764243209 is 90234246721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7569870025 + 5194373184 = 87005^2 + 72072^2 .

It is a cyclic number.

It is not a de Polignac number, because 12764243209 - 2²⁵ = 12730688777 is a prime.

It is not a weakly prime, because it can be changed into another prime (12764243249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6382121604 + 6382121605.

It is an arithmetic number, because the mean of its divisors is an integer number (6382121605).

Almost surely, 2^12764243209 is an apocalyptic number.

It is an amenable number.

12764243209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12764243209 is an equidigital number, since it uses as much as digits as its factorization.

12764243209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 12764243209 in words is "twelve billion, seven hundred sixty-four million, two hundred forty-three thousand, two hundred nine".