26274116261 has 4 divisors (see below), whose sum is σ = 27180120300. Its totient is φ = 25368112224.

The previous prime is 26274116257. The next prime is 26274116269. The reversal of 26274116261 is 16261147262.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16261147262 = 2 ⋅8130573631.

It can be written as a sum of positive squares in 2 ways, for example, as 10240225636 + 16033890625 = 101194^2 + 126625^2 .

It is a cyclic number.

It is not a de Polignac number, because 26274116261 - 2² = 26274116257 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 (26274116269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453001976 + ... + 453002033.

It is an arithmetic number, because the mean of its divisors is an integer number (6795030075).

Almost surely, 2^26274116261 is an apocalyptic number.

It is an amenable number.

26274116261 is a deficient number, since it is larger than the sum of its proper divisors (906004039).

26274116261 is an equidigital number, since it uses as much as digits as its factorization.

26274116261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906004038.

The product of its digits is 48384, while the sum is 38.

The spelling of 26274116261 in words is "twenty-six billion, two hundred seventy-four million, one hundred sixteen thousand, two hundred sixty-one".