26842819457 has 6 divisors (see below), whose sum is σ = 27147820998. Its totient is φ = 26541206912.

The previous prime is 26842819453. The next prime is 26842819513. The reversal of 26842819457 is 75491824862.

It can be written as a sum of positive squares in 3 ways, for example, as 2568867856 + 24273951601 = 50684^2 + 155801^2 .

It is not a de Polignac number, because 26842819457 - 2² = 26842819453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26842819453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1686488 + ... + 1702329.

It is an arithmetic number, because the mean of its divisors is an integer number (4524636833).

Almost surely, 2^26842819457 is an apocalyptic number.

It is an amenable number.

26842819457 is a deficient number, since it is larger than the sum of its proper divisors (305001541).

26842819457 is an frugal number, since it uses more digits than its factorization.

26842819457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3388995 (or 3388906 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 56.

The spelling of 26842819457 in words is "twenty-six billion, eight hundred forty-two million, eight hundred nineteen thousand, four hundred fifty-seven".