16534353643 has 12 divisors (see below), whose sum is σ = 17339890120. Its totient is φ = 15764782176.

The previous prime is 16534353601. The next prime is 16534353751. The reversal of 16534353643 is 34635343561.

It is a de Polignac number, because none of the positive numbers 2^k-16534353643 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 16534353643.

It is not an unprimeable number, because it can be changed into a prime (16534353443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115648 + ... + 215506.

Almost surely, 2^16534353643 is an apocalyptic number.

16534353643 is a deficient number, since it is larger than the sum of its proper divisors (805536477).

16534353643 is an equidigital number, since it uses as much as digits as its factorization.

16534353643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100218 (or 100195 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 43.

The spelling of 16534353643 in words is "sixteen billion, five hundred thirty-four million, three hundred fifty-three thousand, six hundred forty-three".