26490673559 has 12 divisors (see below), whose sum is σ = 30827535264. Its totient is φ = 22697557344.

The previous prime is 26490673511. The next prime is 26490673571. The reversal of 26490673559 is 95537609462.

It is a happy number.

It is not a de Polignac number, because 26490673559 - 2²⁰ = 26489624983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26490673579) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26354 + ... + 231680.

It is an arithmetic number, because the mean of its divisors is an integer number (2568961272).

Almost surely, 2^26490673559 is an apocalyptic number.

26490673559 is a deficient number, since it is larger than the sum of its proper divisors (4336861705).

26490673559 is a wasteful number, since it uses less digits than its factorization.

26490673559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207974 (or 207967 counting only the distinct ones).

The product of its (nonzero) digits is 12247200, while the sum is 56.

The spelling of 26490673559 in words is "twenty-six billion, four hundred ninety million, six hundred seventy-three thousand, five hundred fifty-nine".