26215656829 has 2 divisors, whose sum is σ = 26215656830. Its totient is φ = 26215656828.

The previous prime is 26215656799. The next prime is 26215656889. The reversal of 26215656829 is 92865651262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15337584025 + 10878072804 = 123845^2 + 104298^2 .

It is a cyclic number.

It is not a de Polignac number, because 26215656829 - 2⁹ = 26215656317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26215656889) 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 as a sum of consecutive naturals, namely, 13107828414 + 13107828415.

It is an arithmetic number, because the mean of its divisors is an integer number (13107828415).

Almost surely, 2^26215656829 is an apocalyptic number.

It is an amenable number.

26215656829 is a deficient number, since it is larger than the sum of its proper divisors (1).

26215656829 is an equidigital number, since it uses as much as digits as its factorization.

26215656829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3110400, while the sum is 52.

The spelling of 26215656829 in words is "twenty-six billion, two hundred fifteen million, six hundred fifty-six thousand, eight hundred twenty-nine".