16618568443 has 16 divisors (see below), whose sum is σ = 18108057600. Its totient is φ = 15193405440.

The previous prime is 16618568429. The next prime is 16618568459. The reversal of 16618568443 is 34486581661.

It is a cyclic number.

It is not a de Polignac number, because 16618568443 - 2²⁹ = 16081697531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16618568413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172155 + ... + 250747.

It is an arithmetic number, because the mean of its divisors is an integer number (1131753600).

Almost surely, 2^16618568443 is an apocalyptic number.

16618568443 is a deficient number, since it is larger than the sum of its proper divisors (1489489157).

16618568443 is a wasteful number, since it uses less digits than its factorization.

16618568443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79002.

The product of its digits is 3317760, while the sum is 52.

The spelling of 16618568443 in words is "sixteen billion, six hundred eighteen million, five hundred sixty-eight thousand, four hundred forty-three".