26780824989 has 20 divisors (see below), whose sum is σ = 40857119424. Its totient is φ = 17474010984.

The previous prime is 26780824981. The next prime is 26780824991. The reversal of 26780824989 is 98942808762.

26780824989 is a `hidden beast` number, since 2 + 67 + 8 + 0 + 82 + 498 + 9 = 666.

It is not a de Polignac number, because 26780824989 - 2³ = 26780824981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26780824981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3513507 + ... + 3521120.

Almost surely, 2^26780824989 is an apocalyptic number.

It is an amenable number.

26780824989 is a deficient number, since it is larger than the sum of its proper divisors (14076294435).

26780824989 is an equidigital number, since it uses as much as digits as its factorization.

26780824989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7034686 (or 7034677 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 63.

The spelling of 26780824989 in words is "twenty-six billion, seven hundred eighty million, eight hundred twenty-four thousand, nine hundred eighty-nine".