26139744889 has 2 divisors, whose sum is σ = 26139744890. Its totient is φ = 26139744888.

The previous prime is 26139744853. The next prime is 26139744899. The reversal of 26139744889 is 98844793162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25003515625 + 1136229264 = 158125^2 + 33708^2 .

It is a cyclic number.

It is not a de Polignac number, because 26139744889 - 2¹⁷ = 26139613817 is a prime.

It is not a weakly prime, because it can be changed into another prime (26139744899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13069872444 + 13069872445.

It is an arithmetic number, because the mean of its divisors is an integer number (13069872445).

Almost surely, 2^26139744889 is an apocalyptic number.

It is an amenable number.

26139744889 is a deficient number, since it is larger than the sum of its proper divisors (1).

26139744889 is an equidigital number, since it uses as much as digits as its factorization.

26139744889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20901888, while the sum is 61.

The spelling of 26139744889 in words is "twenty-six billion, one hundred thirty-nine million, seven hundred forty-four thousand, eight hundred eighty-nine".