26138431247 has 2 divisors, whose sum is σ = 26138431248. Its totient is φ = 26138431246.

The previous prime is 26138431229. The next prime is 26138431289. The reversal of 26138431247 is 74213483162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26138431247 - 2²² = 26134236943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26138431217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13069215623 + 13069215624.

It is an arithmetic number, because the mean of its divisors is an integer number (13069215624).

Almost surely, 2^26138431247 is an apocalyptic number.

26138431247 is a deficient number, since it is larger than the sum of its proper divisors (1).

26138431247 is an equidigital number, since it uses as much as digits as its factorization.

26138431247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 41.

The spelling of 26138431247 in words is "twenty-six billion, one hundred thirty-eight million, four hundred thirty-one thousand, two hundred forty-seven".