26253665457 has 4 divisors (see below), whose sum is σ = 35004887280. Its totient is φ = 17502443636.

The previous prime is 26253665447. The next prime is 26253665483. The reversal of 26253665457 is 75456635262.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26253665457 - 2⁶ = 26253665393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26253665407) 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, 4375610907 + ... + 4375610912.

It is an arithmetic number, because the mean of its divisors is an integer number (8751221820).

Almost surely, 2^26253665457 is an apocalyptic number.

It is an amenable number.

26253665457 is a deficient number, since it is larger than the sum of its proper divisors (8751221823).

26253665457 is an equidigital number, since it uses as much as digits as its factorization.

26253665457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8751221822.

The product of its digits is 9072000, while the sum is 51.

The spelling of 26253665457 in words is "twenty-six billion, two hundred fifty-three million, six hundred sixty-five thousand, four hundred fifty-seven".