26504136829 has 4 divisors (see below), whose sum is σ = 26512025980. Its totient is φ = 26496247680.

The previous prime is 26504136817. The next prime is 26504136847. The reversal of 26504136829 is 92863140562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11918743929 + 14585392900 = 109173^2 + 120770^2 .

It is a cyclic number.

It is not a de Polignac number, because 26504136829 - 2²⁹ = 25967265917 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 (26504136889) 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 in 3 ways as a sum of consecutive naturals, for example, 3939534 + ... + 3946255.

It is an arithmetic number, because the mean of its divisors is an integer number (6628006495).

Almost surely, 2^26504136829 is an apocalyptic number.

It is an amenable number.

26504136829 is a deficient number, since it is larger than the sum of its proper divisors (7889151).

26504136829 is an equidigital number, since it uses as much as digits as its factorization.

26504136829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7889150.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 26504136829 in words is "twenty-six billion, five hundred four million, one hundred thirty-six thousand, eight hundred twenty-nine".