16611012443 has 4 divisors (see below), whose sum is σ = 17588130840. Its totient is φ = 15633894048.

The previous prime is 16611012427. The next prime is 16611012461. The reversal of 16611012443 is 34421011661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34421011661 = 317 ⋅108583633.

It is a cyclic number.

It is not a de Polignac number, because 16611012443 - 2⁴ = 16611012427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16611012343) 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, 488559173 + ... + 488559206.

It is an arithmetic number, because the mean of its divisors is an integer number (4397032710).

Almost surely, 2^16611012443 is an apocalyptic number.

16611012443 is a deficient number, since it is larger than the sum of its proper divisors (977118397).

16611012443 is an equidigital number, since it uses as much as digits as its factorization.

16611012443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977118396.

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 16611012443 in words is "sixteen billion, six hundred eleven million, twelve thousand, four hundred forty-three".