26444841978 has 16 divisors (see below), whose sum is σ = 53679083040. Its totient is φ = 8683380816.

The previous prime is 26444841977. The next prime is 26444841979. The reversal of 26444841978 is 87914844462.

It is an interprime number because it is at equal distance from previous prime (26444841977) and next prime (26444841979).

It is not an unprimeable number, because it can be changed into a prime (26444841977) 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, 32891193 + ... + 32891996.

It is an arithmetic number, because the mean of its divisors is an integer number (3354942690).

Almost surely, 2^26444841978 is an apocalyptic number.

26444841978 is an abundant number, since it is smaller than the sum of its proper divisors (27234241062).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26444841978 is a wasteful number, since it uses less digits than its factorization.

26444841978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65783261.

The product of its digits is 12386304, while the sum is 57.

It can be divided in two parts, 2644484 and 1978, that added together give a palindrome (2646462).

The spelling of 26444841978 in words is "twenty-six billion, four hundred forty-four million, eight hundred forty-one thousand, nine hundred seventy-eight".