26436782989 has 8 divisors (see below), whose sum is σ = 27894301280. Its totient is φ = 24985875600.

The previous prime is 26436782971. The next prime is 26436782993. The reversal of 26436782989 is 98928763462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26436782989 - 2⁷ = 26436782861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26436782989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26436782959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1644507 + ... + 1660504.

It is an arithmetic number, because the mean of its divisors is an integer number (3486787660).

Almost surely, 2^26436782989 is an apocalyptic number.

It is an amenable number.

26436782989 is a deficient number, since it is larger than the sum of its proper divisors (1457518291).

26436782989 is a wasteful number, since it uses less digits than its factorization.

26436782989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305451.

The product of its digits is 62705664, while the sum is 64.

The spelling of 26436782989 in words is "twenty-six billion, four hundred thirty-six million, seven hundred eighty-two thousand, nine hundred eighty-nine".