13581612499 has 12 divisors (see below), whose sum is σ = 16807677456. Its totient is φ = 10745890272.

The previous prime is 13581612497. The next prime is 13581612503. The reversal of 13581612499 is 99421618531.

It is a happy number.

It is not a de Polignac number, because 13581612499 - 2¹ = 13581612497 is a prime.

It is a super-3 number, since 3×13581612499³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13581612497) 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, 5739144 + ... + 5741509.

It is an arithmetic number, because the mean of its divisors is an integer number (1400639788).

Almost surely, 2^13581612499 is an apocalyptic number.

13581612499 is a deficient number, since it is larger than the sum of its proper divisors (3226064957).

13581612499 is a wasteful number, since it uses less digits than its factorization.

13581612499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11480686 (or 11480673 counting only the distinct ones).

The product of its digits is 466560, while the sum is 49.

The spelling of 13581612499 in words is "thirteen billion, five hundred eighty-one million, six hundred twelve thousand, four hundred ninety-nine".