12642802813 has 2 divisors, whose sum is σ = 12642802814. Its totient is φ = 12642802812.

The previous prime is 12642802751. The next prime is 12642802831. The reversal of 12642802813 is 31820824621.

It is a happy number.

Together with next prime (12642802831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10893723129 + 1749079684 = 104373^2 + 41822^2 .

It is a cyclic number.

It is not a de Polignac number, because 12642802813 - 2²¹ = 12640705661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12642802873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6321401406 + 6321401407.

It is an arithmetic number, because the mean of its divisors is an integer number (6321401407).

Almost surely, 2^12642802813 is an apocalyptic number.

It is an amenable number.

12642802813 is a deficient number, since it is larger than the sum of its proper divisors (1).

12642802813 is an equidigital number, since it uses as much as digits as its factorization.

12642802813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 12642802813 in words is "twelve billion, six hundred forty-two million, eight hundred two thousand, eight hundred thirteen".