26478885289 has 2 divisors, whose sum is σ = 26478885290. Its totient is φ = 26478885288.

The previous prime is 26478885283. The next prime is 26478885373. The reversal of 26478885289 is 98258887462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25923576064 + 555309225 = 161008^2 + 23565^2 .

It is a cyclic number.

It is not a de Polignac number, because 26478885289 - 2²³ = 26470496681 is a prime.

It is a super-2 number, since 2×26478885289² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26478885283) 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, 13239442644 + 13239442645.

It is an arithmetic number, because the mean of its divisors is an integer number (13239442645).

Almost surely, 2^26478885289 is an apocalyptic number.

It is an amenable number.

26478885289 is a deficient number, since it is larger than the sum of its proper divisors (1).

26478885289 is an equidigital number, since it uses as much as digits as its factorization.

26478885289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 123863040, while the sum is 67.

The spelling of 26478885289 in words is "twenty-six billion, four hundred seventy-eight million, eight hundred eighty-five thousand, two hundred eighty-nine".