26261238791 has 2 divisors, whose sum is σ = 26261238792. Its totient is φ = 26261238790.

The previous prime is 26261238739. The next prime is 26261238821. The reversal of 26261238791 is 19783216262.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26261238791 - 2⁶ = 26261238727 is a prime.

It is a super-3 number, since 3×26261238791³ (a number of 32 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26261238191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13130619395 + 13130619396.

It is an arithmetic number, because the mean of its divisors is an integer number (13130619396).

Almost surely, 2^26261238791 is an apocalyptic number.

26261238791 is a deficient number, since it is larger than the sum of its proper divisors (1).

26261238791 is an equidigital number, since it uses as much as digits as its factorization.

26261238791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The spelling of 26261238791 in words is "twenty-six billion, two hundred sixty-one million, two hundred thirty-eight thousand, seven hundred ninety-one".