26398290289 has 4 divisors (see below), whose sum is σ = 30169474624. Its totient is φ = 22627105956.

The previous prime is 26398290287. The next prime is 26398290313. The reversal of 26398290289 is 98209289362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 26398290289 - 2¹ = 26398290287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26398290283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1885592157 + ... + 1885592170.

It is an arithmetic number, because the mean of its divisors is an integer number (7542368656).

Almost surely, 2^26398290289 is an apocalyptic number.

It is an amenable number.

26398290289 is a deficient number, since it is larger than the sum of its proper divisors (3771184335).

26398290289 is an equidigital number, since it uses as much as digits as its factorization.

26398290289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3771184334.

The product of its (nonzero) digits is 6718464, while the sum is 58.

It can be divided in two parts, 2639 and 8290289, that added together give a palindrome (8292928).

The spelling of 26398290289 in words is "twenty-six billion, three hundred ninety-eight million, two hundred ninety thousand, two hundred eighty-nine".