13746056209 has 4 divisors (see below), whose sum is σ = 13746438720. Its totient is φ = 13745673700.

The previous prime is 13746056171. The next prime is 13746056213. The reversal of 13746056209 is 90265064731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90265064731 = 29 ⋅3112588439.

It is a cyclic number.

It is not a de Polignac number, because 13746056209 - 2²¹ = 13743959057 is a prime.

It is a super-2 number, since 2×13746056209² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13746056609) 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, 131029 + ... + 211330.

It is an arithmetic number, because the mean of its divisors is an integer number (3436609680).

Almost surely, 2^13746056209 is an apocalyptic number.

It is an amenable number.

13746056209 is a deficient number, since it is larger than the sum of its proper divisors (382511).

13746056209 is an equidigital number, since it uses as much as digits as its factorization.

13746056209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382510.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 13746056209 in words is "thirteen billion, seven hundred forty-six million, fifty-six thousand, two hundred nine".