26704311643 has 4 divisors (see below), whose sum is σ = 26729293360. Its totient is φ = 26679329928.

The previous prime is 26704311607. The next prime is 26704311707. The reversal of 26704311643 is 34611340762.

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

It is a cyclic number.

It is not a de Polignac number, because 26704311643 - 2²⁹ = 26167440731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26704311443) 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, 12489255 + ... + 12491392.

It is an arithmetic number, because the mean of its divisors is an integer number (6682323340).

Almost surely, 2^26704311643 is an apocalyptic number.

26704311643 is a deficient number, since it is larger than the sum of its proper divisors (24981717).

26704311643 is a wasteful number, since it uses less digits than its factorization.

26704311643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24981716.

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 26704311643 in words is "twenty-six billion, seven hundred four million, three hundred eleven thousand, six hundred forty-three".