26440268138 has 8 divisors (see below), whose sum is σ = 39736236288. Its totient is φ = 13194856044.

The previous prime is 26440268137. The next prime is 26440268207. The reversal of 26440268138 is 83186204462.

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

It is not an unprimeable number, because it can be changed into a prime (26440268137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12637706 + ... + 12639797.

It is an arithmetic number, because the mean of its divisors is an integer number (4967029536).

Almost surely, 2^26440268138 is an apocalyptic number.

26440268138 is a deficient number, since it is larger than the sum of its proper divisors (13295968150).

26440268138 is a wasteful number, since it uses less digits than its factorization.

26440268138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25278028.

The product of its (nonzero) digits is 442368, while the sum is 44.

The spelling of 26440268138 in words is "twenty-six billion, four hundred forty million, two hundred sixty-eight thousand, one hundred thirty-eight".