26251126261 has 2 divisors, whose sum is σ = 26251126262. Its totient is φ = 26251126260.

The previous prime is 26251126183. The next prime is 26251126267. The reversal of 26251126261 is 16262115262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25782403761 + 468722500 = 160569^2 + 21650^2 .

It is a cyclic number.

It is not a de Polignac number, because 26251126261 - 2²⁷ = 26116908533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26251126267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13125563130 + 13125563131.

It is an arithmetic number, because the mean of its divisors is an integer number (13125563131).

Almost surely, 2^26251126261 is an apocalyptic number.

It is an amenable number.

26251126261 is a deficient number, since it is larger than the sum of its proper divisors (1).

26251126261 is an equidigital number, since it uses as much as digits as its factorization.

26251126261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The spelling of 26251126261 in words is "twenty-six billion, two hundred fifty-one million, one hundred twenty-six thousand, two hundred sixty-one".