26563458289 has 9 divisors (see below), whose sum is σ = 26696956107. Its totient is φ = 26430627144.

The previous prime is 26563458283. The next prime is 26563458323. The reversal of 26563458289 is 98285436562.

The square root of 26563458289 is 162983.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 19497374689 + 7066083600 = 139633^2 + 84060^2 .

It is not a de Polignac number, because 26563458289 - 2²¹ = 26561361137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26563458283) 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 8 ways as a sum of consecutive naturals, for example, 56880834 + ... + 56881300.

Almost surely, 2^26563458289 is an apocalyptic number.

26563458289 is the 162983-rd square number.

26563458289 is the 81492-nd centered octagonal number.

It is an amenable number.

26563458289 is a deficient number, since it is larger than the sum of its proper divisors (133497818).

26563458289 is an frugal number, since it uses more digits than its factorization.

26563458289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632 (or 816 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 58.

The spelling of 26563458289 in words is "twenty-six billion, five hundred sixty-three million, four hundred fifty-eight thousand, two hundred eighty-nine".