26812089449 has 2 divisors, whose sum is σ = 26812089450. Its totient is φ = 26812089448.

The previous prime is 26812089439. The next prime is 26812089463. The reversal of 26812089449 is 94498021862.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21277473424 + 5534616025 = 145868^2 + 74395^2 .

It is a cyclic number.

It is not a de Polignac number, because 26812089449 - 2²⁰ = 26811040873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26812089449.

It is not a weakly prime, because it can be changed into another prime (26812089439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13406044724 + 13406044725.

It is an arithmetic number, because the mean of its divisors is an integer number (13406044725).

Almost surely, 2^26812089449 is an apocalyptic number.

It is an amenable number.

26812089449 is a deficient number, since it is larger than the sum of its proper divisors (1).

26812089449 is an equidigital number, since it uses as much as digits as its factorization.

26812089449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 26812089449 in words is "twenty-six billion, eight hundred twelve million, eighty-nine thousand, four hundred forty-nine".