13436395409 has 4 divisors (see below), whose sum is σ = 13436945460. Its totient is φ = 13435845360.

The previous prime is 13436395393. The next prime is 13436395421. The reversal of 13436395409 is 90459363431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2251217809 + 11185177600 = 47447^2 + 105760^2 .

It is a cyclic number.

It is not a de Polignac number, because 13436395409 - 2⁴ = 13436395393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13436395429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236594 + ... + 287835.

It is an arithmetic number, because the mean of its divisors is an integer number (3359236365).

Almost surely, 2^13436395409 is an apocalyptic number.

It is an amenable number.

13436395409 is a deficient number, since it is larger than the sum of its proper divisors (550051).

13436395409 is an equidigital number, since it uses as much as digits as its factorization.

13436395409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550050.

The product of its (nonzero) digits is 1049760, while the sum is 47.

The spelling of 13436395409 in words is "thirteen billion, four hundred thirty-six million, three hundred ninety-five thousand, four hundred nine".