26638613265 has 32 divisors (see below), whose sum is σ = 46689489792. Its totient is φ = 12862080000.

The previous prime is 26638613251. The next prime is 26638613299. The reversal of 26638613265 is 56231683662.

It is not a de Polignac number, because 26638613265 - 2⁹ = 26638612753 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295186 + ... + 374715.

It is an arithmetic number, because the mean of its divisors is an integer number (1459046556).

Almost surely, 2^26638613265 is an apocalyptic number.

It is an amenable number.

26638613265 is a deficient number, since it is larger than the sum of its proper divisors (20050876527).

26638613265 is a wasteful number, since it uses less digits than its factorization.

26638613265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670161.

The product of its digits is 1866240, while the sum is 48.

The spelling of 26638613265 in words is "twenty-six billion, six hundred thirty-eight million, six hundred thirteen thousand, two hundred sixty-five".