26231351261 has 4 divisors (see below), whose sum is σ = 26236342524. Its totient is φ = 26226360000.

The previous prime is 26231351257. The next prime is 26231351269. The reversal of 26231351261 is 16215313262.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10198980100 + 16032371161 = 100990^2 + 126619^2 .

It is a cyclic number.

It is not a de Polignac number, because 26231351261 - 2² = 26231351257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26231351269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2487740 + ... + 2498261.

It is an arithmetic number, because the mean of its divisors is an integer number (6559085631).

Almost surely, 2^26231351261 is an apocalyptic number.

It is an amenable number.

26231351261 is a deficient number, since it is larger than the sum of its proper divisors (4991263).

26231351261 is an equidigital number, since it uses as much as digits as its factorization.

26231351261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4991262.

The product of its digits is 12960, while the sum is 32.

The spelling of 26231351261 in words is "twenty-six billion, two hundred thirty-one million, three hundred fifty-one thousand, two hundred sixty-one".