16636213963 has 2 divisors, whose sum is σ = 16636213964. Its totient is φ = 16636213962.

The previous prime is 16636213961. The next prime is 16636214071. The reversal of 16636213963 is 36931263661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16636213963 - 2¹ = 16636213961 is a prime.

Together with 16636213961, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16636213961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8318106981 + 8318106982.

It is an arithmetic number, because the mean of its divisors is an integer number (8318106982).

Almost surely, 2^16636213963 is an apocalyptic number.

16636213963 is a deficient number, since it is larger than the sum of its proper divisors (1).

16636213963 is an equidigital number, since it uses as much as digits as its factorization.

16636213963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 46.

The spelling of 16636213963 in words is "sixteen billion, six hundred thirty-six million, two hundred thirteen thousand, nine hundred sixty-three".