12647802389 has 4 divisors (see below), whose sum is σ = 12989634924. Its totient is φ = 12305969856.

The previous prime is 12647802367. The next prime is 12647802397. The reversal of 12647802389 is 98320874621.

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 8260992100 + 4386810289 = 90890^2 + 66233^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12647802389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12647832389) 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, 170916212 + ... + 170916285.

It is an arithmetic number, because the mean of its divisors is an integer number (3247408731).

Almost surely, 2^12647802389 is an apocalyptic number.

It is an amenable number.

12647802389 is a deficient number, since it is larger than the sum of its proper divisors (341832535).

12647802389 is an equidigital number, since it uses as much as digits as its factorization.

12647802389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341832534.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 12647802389 in words is "twelve billion, six hundred forty-seven million, eight hundred two thousand, three hundred eighty-nine".