8138726077639 has 2 divisors, whose sum is σ = 8138726077640. Its totient is φ = 8138726077638.

The previous prime is 8138726077631. The next prime is 8138726077661. The reversal of 8138726077639 is 9367706278318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8138726077639 - 2³ = 8138726077631 is a prime.

It is a super-2 number, since 2×8138726077639² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8138726077631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4069363038819 + 4069363038820.

It is an arithmetic number, because the mean of its divisors is an integer number (4069363038820).

Almost surely, 2^{8138726077639} is an apocalyptic number.

8138726077639 is a deficient number, since it is larger than the sum of its proper divisors (1).

8138726077639 is an equidigital number, since it uses as much as digits as its factorization.

8138726077639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128024064, while the sum is 67.

The spelling of 8138726077639 in words is "eight trillion, one hundred thirty-eight billion, seven hundred twenty-six million, seventy-seven thousand, six hundred thirty-nine".