26509409311 has 16 divisors (see below), whose sum is σ = 34790204160. Its totient is φ = 19569487680.

The previous prime is 26509409257. The next prime is 26509409317. The reversal of 26509409311 is 11390490562.

It is a cyclic number.

It is not a de Polignac number, because 26509409311 - 2⁷ = 26509409183 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 (26509409317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9058486 + ... + 9061411.

It is an arithmetic number, because the mean of its divisors is an integer number (2174387760).

Almost surely, 2^26509409311 is an apocalyptic number.

26509409311 is a deficient number, since it is larger than the sum of its proper divisors (8280794849).

26509409311 is a wasteful number, since it uses less digits than its factorization.

26509409311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18119934.

The product of its (nonzero) digits is 58320, while the sum is 40.

Adding to 26509409311 its reverse (11390490562), we get a palindrome (37899899873).

The spelling of 26509409311 in words is "twenty-six billion, five hundred nine million, four hundred nine thousand, three hundred eleven".