26581842559 has 2 divisors, whose sum is σ = 26581842560. Its totient is φ = 26581842558.

The previous prime is 26581842557. The next prime is 26581842611. The reversal of 26581842559 is 95524818562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26581842559 - 2¹ = 26581842557 is a prime.

Together with 26581842557, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26581842557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13290921279 + 13290921280.

It is an arithmetic number, because the mean of its divisors is an integer number (13290921280).

Almost surely, 2^26581842559 is an apocalyptic number.

26581842559 is a deficient number, since it is larger than the sum of its proper divisors (1).

26581842559 is an equidigital number, since it uses as much as digits as its factorization.

26581842559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912000, while the sum is 55.

The spelling of 26581842559 in words is "twenty-six billion, five hundred eighty-one million, eight hundred forty-two thousand, five hundred fifty-nine".