26504958209 has 2 divisors, whose sum is σ = 26504958210. Its totient is φ = 26504958208.

The previous prime is 26504958199. The next prime is 26504958217. The reversal of 26504958209 is 90285940562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14997676225 + 11507281984 = 122465^2 + 107272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26504958209 is a prime.

It is not a weakly prime, because it can be changed into another prime (26504958239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13252479104 + 13252479105.

It is an arithmetic number, because the mean of its divisors is an integer number (13252479105).

Almost surely, 2^26504958209 is an apocalyptic number.

It is an amenable number.

26504958209 is a deficient number, since it is larger than the sum of its proper divisors (1).

26504958209 is an equidigital number, since it uses as much as digits as its factorization.

26504958209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 26504958209 in words is "twenty-six billion, five hundred four million, nine hundred fifty-eight thousand, two hundred nine".