13443666512 has 10 divisors (see below), whose sum is σ = 26047103898. Its totient is φ = 6721833248.

The previous prime is 13443666463. The next prime is 13443666517. The reversal of 13443666512 is 21566634431.

It can be written as a sum of positive squares in only one way, i.e., 7496789056 + 5946877456 = 86584^2 + 77116^2 .

It is a super-2 number, since 2×13443666512² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13443666512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13443666517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420114563 + ... + 420114594.

Almost surely, 2^13443666512 is an apocalyptic number.

It is an amenable number.

13443666512 is a deficient number, since it is larger than the sum of its proper divisors (12603437386).

13443666512 is an equidigital number, since it uses as much as digits as its factorization.

13443666512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840229165 (or 840229159 counting only the distinct ones).

The product of its digits is 311040, while the sum is 41.

The spelling of 13443666512 in words is "thirteen billion, four hundred forty-three million, six hundred sixty-six thousand, five hundred twelve".