26491768439 has 8 divisors (see below), whose sum is σ = 27150332160. Its totient is φ = 25841285496.

The previous prime is 26491768403. The next prime is 26491768451. The reversal of 26491768439 is 93486719462.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26491768439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26491768489) 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, 2013557 + ... + 2026670.

It is an arithmetic number, because the mean of its divisors is an integer number (3393791520).

Almost surely, 2^26491768439 is an apocalyptic number.

26491768439 is a deficient number, since it is larger than the sum of its proper divisors (658563721).

26491768439 is an equidigital number, since it uses as much as digits as its factorization.

26491768439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040389.

The product of its digits is 15676416, while the sum is 59.

The spelling of 26491768439 in words is "twenty-six billion, four hundred ninety-one million, seven hundred sixty-eight thousand, four hundred thirty-nine".