26604249309 has 48 divisors (see below), whose sum is σ = 43751977920. Its totient is φ = 15963948000.

The previous prime is 26604249299. The next prime is 26604249313. The reversal of 26604249309 is 90394240662.

26604249309 is a `hidden beast` number, since 2 + 6 + 604 + 2 + 4 + 9 + 30 + 9 = 666.

It is not a de Polignac number, because 26604249309 - 2⁵ = 26604249277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26604249509) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 289654 + ... + 370280.

It is an arithmetic number, because the mean of its divisors is an integer number (911499540).

Almost surely, 2^26604249309 is an apocalyptic number.

It is an amenable number.

26604249309 is a deficient number, since it is larger than the sum of its proper divisors (17147728611).

26604249309 is a wasteful number, since it uses less digits than its factorization.

26604249309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80759 (or 80742 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The spelling of 26604249309 in words is "twenty-six billion, six hundred four million, two hundred forty-nine thousand, three hundred nine".