28644267817013 has 2 divisors, whose sum is σ = 28644267817014. Its totient is φ = 28644267817012.

The previous prime is 28644267817003. The next prime is 28644267817027. The reversal of 28644267817013 is 31071876244682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22865926839889 + 5778340977124 = 4781833^2 + 2403818^2 .

It is a cyclic number.

It is not a de Polignac number, because 28644267817013 - 2³² = 28639972849717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28644267817003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14322133908506 + 14322133908507.

It is an arithmetic number, because the mean of its divisors is an integer number (14322133908507).

Almost surely, 2^{28644267817013} is an apocalyptic number.

It is an amenable number.

28644267817013 is a deficient number, since it is larger than the sum of its proper divisors (1).

28644267817013 is an equidigital number, since it uses as much as digits as its factorization.

28644267817013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21676032, while the sum is 59.

The spelling of 28644267817013 in words is "twenty-eight trillion, six hundred forty-four billion, two hundred sixty-seven million, eight hundred seventeen thousand, thirteen".