8138726077439 has 2 divisors, whose sum is σ = 8138726077440. Its totient is φ = 8138726077438.

The previous prime is 8138726077409. The next prime is 8138726077441. The reversal of 8138726077439 is 9347706278318.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8138726077439 is a prime.

It is a super-2 number, since 2×8138726077439² (a number of 27 digits) contains 22 as substring.

Together with 8138726077441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8138726077409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4069363038719 + 4069363038720.

It is an arithmetic number, because the mean of its divisors is an integer number (4069363038720).

Almost surely, 2^{8138726077439} is an apocalyptic number.

8138726077439 is a deficient number, since it is larger than the sum of its proper divisors (1).

8138726077439 is an equidigital number, since it uses as much as digits as its factorization.

8138726077439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85349376, while the sum is 65.

The spelling of 8138726077439 in words is "eight trillion, one hundred thirty-eight billion, seven hundred twenty-six million, seventy-seven thousand, four hundred thirty-nine".