26513877509 has 24 divisors (see below), whose sum is σ = 32203453248. Its totient is φ = 21724718400.

The previous prime is 26513877487. The next prime is 26513877517. The reversal of 26513877509 is 90577831562.

It is not a de Polignac number, because 26513877509 - 2²⁴ = 26497100293 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 (26513877809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2097809 + ... + 2110409.

It is an arithmetic number, because the mean of its divisors is an integer number (1341810552).

Almost surely, 2^26513877509 is an apocalyptic number.

It is an amenable number.

26513877509 is a deficient number, since it is larger than the sum of its proper divisors (5689575739).

26513877509 is a wasteful number, since it uses less digits than its factorization.

26513877509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14505 (or 14498 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 53.

The spelling of 26513877509 in words is "twenty-six billion, five hundred thirteen million, eight hundred seventy-seven thousand, five hundred nine".