26256808243 has 4 divisors (see below), whose sum is σ = 26257546120. Its totient is φ = 26256070368.

The previous prime is 26256808199. The next prime is 26256808289. The reversal of 26256808243 is 34280865262.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26256808243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26256808193 and 26256808202.

It is not an unprimeable number, because it can be changed into a prime (26256838243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312705 + ... + 387682.

It is an arithmetic number, because the mean of its divisors is an integer number (6564386530).

Almost surely, 2^26256808243 is an apocalyptic number.

26256808243 is a deficient number, since it is larger than the sum of its proper divisors (737877).

26256808243 is an equidigital number, since it uses as much as digits as its factorization.

26256808243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737876.

The product of its (nonzero) digits is 1105920, while the sum is 46.

The spelling of 26256808243 in words is "twenty-six billion, two hundred fifty-six million, eight hundred eight thousand, two hundred forty-three".