26639999944 has 16 divisors (see below), whose sum is σ = 49956093900. Its totient is φ = 13318374912.

The previous prime is 26639999927. The next prime is 26639999951. The reversal of 26639999944 is 44999993662.

It can be written as a sum of positive squares in 2 ways, for example, as 25876583044 + 763416900 = 160862^2 + 27630^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131997 + ... + 265900.

Almost surely, 2^26639999944 is an apocalyptic number.

It is an amenable number.

26639999944 is a deficient number, since it is larger than the sum of its proper divisors (23316093956).

26639999944 is a wasteful number, since it uses less digits than its factorization.

26639999944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406272 (or 406268 counting only the distinct ones).

The product of its digits is 204073344, while the sum is 70.

The spelling of 26639999944 in words is "twenty-six billion, six hundred thirty-nine million, nine hundred ninety-nine thousand, nine hundred forty-four".