26944444993537 has 4 divisors (see below), whose sum is σ = 28529412346116. Its totient is φ = 25359477640960.

The previous prime is 26944444993471. The next prime is 26944444993541. The reversal of 26944444993537 is 73539944444962.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21485301530176 + 5459143463361 = 4635224^2 + 2336481^2 .

It is not a de Polignac number, because 26944444993537 - 2¹¹ = 26944444991489 is a prime.

It is a super-2 number, since 2×26944444993537² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26944444993537.

It is not an unprimeable number, because it can be changed into a prime (26944444993577) 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, 792483676264 + ... + 792483676297.

It is an arithmetic number, because the mean of its divisors is an integer number (7132353086529).

Almost surely, 2^{26944444993537} is an apocalyptic number.

It is an amenable number.

26944444993537 is a deficient number, since it is larger than the sum of its proper divisors (1584967352579).

26944444993537 is a wasteful number, since it uses less digits than its factorization.

26944444993537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584967352578.

The product of its digits is 2821754880, while the sum is 73.

The spelling of 26944444993537 in words is "twenty-six trillion, nine hundred forty-four billion, four hundred forty-four million, nine hundred ninety-three thousand, five hundred thirty-seven".