13442638399 has 2 divisors, whose sum is σ = 13442638400. Its totient is φ = 13442638398.

The previous prime is 13442638367. The next prime is 13442638441. The reversal of 13442638399 is 99383624431.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13442638399 - 2⁵ = 13442638367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13442678399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6721319199 + 6721319200.

It is an arithmetic number, because the mean of its divisors is an integer number (6721319200).

Almost surely, 2^13442638399 is an apocalyptic number.

13442638399 is a deficient number, since it is larger than the sum of its proper divisors (1).

13442638399 is an equidigital number, since it uses as much as digits as its factorization.

13442638399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3359232, while the sum is 52.

The spelling of 13442638399 in words is "thirteen billion, four hundred forty-two million, six hundred thirty-eight thousand, three hundred ninety-nine".