13145556443 has 4 divisors (see below), whose sum is σ = 13154567880. Its totient is φ = 13136545008.

The previous prime is 13145556427. The next prime is 13145556481. The reversal of 13145556443 is 34465554131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13145556443 - 2⁴ = 13145556427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13145556443.

It is not an unprimeable number, because it can be changed into a prime (13145556143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4503530 + ... + 4506447.

It is an arithmetic number, because the mean of its divisors is an integer number (3288641970).

Almost surely, 2^13145556443 is an apocalyptic number.

13145556443 is a deficient number, since it is larger than the sum of its proper divisors (9011437).

13145556443 is an equidigital number, since it uses as much as digits as its factorization.

13145556443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9011436.

The product of its digits is 432000, while the sum is 41.

The spelling of 13145556443 in words is "thirteen billion, one hundred forty-five million, five hundred fifty-six thousand, four hundred forty-three".