13435579809 has 32 divisors (see below), whose sum is σ = 20110049280. Its totient is φ = 8864931600.

The previous prime is 13435579783. The next prime is 13435579813. The reversal of 13435579809 is 90897553431.

13435579809 is a `hidden beast` number, since 1 + 3 + 4 + 3 + 557 + 9 + 80 + 9 = 666.

It is not a de Polignac number, because 13435579809 - 2⁵ = 13435579777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13435579879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1473354 + ... + 1482444.

It is an arithmetic number, because the mean of its divisors is an integer number (628439040).

Almost surely, 2^13435579809 is an apocalyptic number.

It is an amenable number.

13435579809 is a deficient number, since it is larger than the sum of its proper divisors (6674469471).

13435579809 is a wasteful number, since it uses less digits than its factorization.

13435579809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9658 (or 9652 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 13435579809 in words is "thirteen billion, four hundred thirty-five million, five hundred seventy-nine thousand, eight hundred nine".