26423888645 has 48 divisors (see below), whose sum is σ = 39949386624. Its totient is φ = 16423651200.

The previous prime is 26423888641. The next prime is 26423888653. The reversal of 26423888645 is 54688832462.

It is a happy number.

It is not a de Polignac number, because 26423888645 - 2² = 26423888641 is a prime.

It is a super-3 number, since 3×26423888645³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26423888641) 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 47 ways as a sum of consecutive naturals, for example, 1460555 + ... + 1478535.

It is an arithmetic number, because the mean of its divisors is an integer number (832278888).

Almost surely, 2^26423888645 is an apocalyptic number.

It is an amenable number.

26423888645 is a deficient number, since it is larger than the sum of its proper divisors (13525497979).

26423888645 is a wasteful number, since it uses less digits than its factorization.

26423888645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18362 (or 18351 counting only the distinct ones).

The product of its digits is 17694720, while the sum is 56.

The spelling of 26423888645 in words is "twenty-six billion, four hundred twenty-three million, eight hundred eighty-eight thousand, six hundred forty-five".