26213552809 has 2 divisors, whose sum is σ = 26213552810. Its totient is φ = 26213552808.

The previous prime is 26213552803. The next prime is 26213552843. The reversal of 26213552809 is 90825531262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26178269209 + 35283600 = 161797^2 + 5940^2 .

It is a cyclic number.

It is not a de Polignac number, because 26213552809 - 2⁹ = 26213552297 is a prime.

It is a super-3 number, since 3×26213552809³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (26213552803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13106776404 + 13106776405.

It is an arithmetic number, because the mean of its divisors is an integer number (13106776405).

Almost surely, 2^26213552809 is an apocalyptic number.

It is an amenable number.

26213552809 is a deficient number, since it is larger than the sum of its proper divisors (1).

26213552809 is an equidigital number, since it uses as much as digits as its factorization.

26213552809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 26213552809 in words is "twenty-six billion, two hundred thirteen million, five hundred fifty-two thousand, eight hundred nine".