13501742809 has 9 divisors (see below), whose sum is σ = 13620952501. Its totient is φ = 13383570460.

The previous prime is 13501742791. The next prime is 13501742819. The reversal of 13501742809 is 90824710531.

The square root of 13501742809 is 116197.

It is a perfect power (a square), and thus also a powerful number.

13501742809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13501742809 - 2⁵ = 13501742777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13501742819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15221364 + ... + 15222250.

Almost surely, 2^13501742809 is an apocalyptic number.

13501742809 is the 116197-th square number.

13501742809 is the 58099-th centered octagonal number.

It is an amenable number.

13501742809 is a deficient number, since it is larger than the sum of its proper divisors (119209692).

13501742809 is an frugal number, since it uses more digits than its factorization.

13501742809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036 (or 1018 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 13501742809 in words is "thirteen billion, five hundred one million, seven hundred forty-two thousand, eight hundred nine".