13661334643 has 8 divisors (see below), whose sum is σ = 15184468656. Its totient is φ = 12185066400.

The previous prime is 13661334611. The next prime is 13661334689. The reversal of 13661334643 is 34643316631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13661334643 - 2⁵ = 13661334611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13661334596 and 13661334605.

It is not an unprimeable number, because it can be changed into a prime (13661334143) 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 7 ways as a sum of consecutive naturals, for example, 11715828 + ... + 11716993.

It is an arithmetic number, because the mean of its divisors is an integer number (1898058582).

Almost surely, 2^13661334643 is an apocalyptic number.

13661334643 is a deficient number, since it is larger than the sum of its proper divisors (1523134013).

13661334643 is a wasteful number, since it uses less digits than its factorization.

13661334643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23432885.

The product of its digits is 279936, while the sum is 40.

The spelling of 13661334643 in words is "thirteen billion, six hundred sixty-one million, three hundred thirty-four thousand, six hundred forty-three".