13345173909 has 12 divisors (see below), whose sum is σ = 19282824652. Its totient is φ = 8893800000.

The previous prime is 13345173901. The next prime is 13345173931. The reversal of 13345173909 is 90937154331.

13345173909 is a `hidden beast` number, since 13 + 34 + 517 + 3 + 90 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6905111409 + 6440062500 = 83097^2 + 80250^2 .

It is not a de Polignac number, because 13345173909 - 2³ = 13345173901 is a prime.

It is a super-2 number, since 2×13345173909² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13345173901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220042 + ... + 274059.

Almost surely, 2^13345173909 is an apocalyptic number.

It is an amenable number.

13345173909 is a deficient number, since it is larger than the sum of its proper divisors (5937650743).

13345173909 is a wasteful number, since it uses less digits than its factorization.

13345173909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497108 (or 497105 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The spelling of 13345173909 in words is "thirteen billion, three hundred forty-five million, one hundred seventy-three thousand, nine hundred nine".