13646665243 has 8 divisors (see below), whose sum is σ = 13715336448. Its totient is φ = 13578121704.

The previous prime is 13646665231. The next prime is 13646665259. The reversal of 13646665243 is 34256664631.

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 13646665243 - 2⁵ = 13646665211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13646665193 and 13646665202.

It is not an unprimeable number, because it can be changed into a prime (13646665273) 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, 186130 + ... + 248872.

It is an arithmetic number, because the mean of its divisors is an integer number (1714417056).

Almost surely, 2^13646665243 is an apocalyptic number.

13646665243 is a deficient number, since it is larger than the sum of its proper divisors (68671205).

13646665243 is an equidigital number, since it uses as much as digits as its factorization.

13646665243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63833.

The product of its digits is 1866240, while the sum is 46.

The spelling of 13646665243 in words is "thirteen billion, six hundred forty-six million, six hundred sixty-five thousand, two hundred forty-three".