16536642643 has 2 divisors, whose sum is σ = 16536642644. Its totient is φ = 16536642642.

The previous prime is 16536642607. The next prime is 16536642691. The reversal of 16536642643 is 34624663561.

16536642643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16536642643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16536642593 and 16536642602.

It is not a weakly prime, because it can be changed into another prime (16536642043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8268321321 + 8268321322.

It is an arithmetic number, because the mean of its divisors is an integer number (8268321322).

Almost surely, 2^16536642643 is an apocalyptic number.

16536642643 is a deficient number, since it is larger than the sum of its proper divisors (1).

16536642643 is an equidigital number, since it uses as much as digits as its factorization.

16536642643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 46.

The spelling of 16536642643 in words is "sixteen billion, five hundred thirty-six million, six hundred forty-two thousand, six hundred forty-three".