26845839409 has 3 divisors (see below), whose sum is σ = 26846003257. Its totient is φ = 26845675562.

The previous prime is 26845839311. The next prime is 26845839443. The reversal of 26845839409 is 90493854862.

The square root of 26845839409 is 163847.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 26845839409 - 2⁷ = 26845839281 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26845839479) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 81924 + ... + 245770.

Almost surely, 2^26845839409 is an apocalyptic number.

26845839409 is the 163847-th square number.

26845839409 is the 81924-th centered octagonal number.

It is an amenable number.

26845839409 is a deficient number, since it is larger than the sum of its proper divisors (163848).

26845839409 is an frugal number, since it uses more digits than its factorization.

26845839409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327694 (or 163847 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 58.

The spelling of 26845839409 in words is "twenty-six billion, eight hundred forty-five million, eight hundred thirty-nine thousand, four hundred nine".