16631813243 has 2 divisors, whose sum is σ = 16631813244. Its totient is φ = 16631813242.

The previous prime is 16631813227. The next prime is 16631813257. The reversal of 16631813243 is 34231813661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16631813243 - 2⁴ = 16631813227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16631813197 and 16631813206.

It is not a weakly prime, because it can be changed into another prime (16634813243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8315906621 + 8315906622.

It is an arithmetic number, because the mean of its divisors is an integer number (8315906622).

Almost surely, 2^16631813243 is an apocalyptic number.

16631813243 is a deficient number, since it is larger than the sum of its proper divisors (1).

16631813243 is an equidigital number, since it uses as much as digits as its factorization.

16631813243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The spelling of 16631813243 in words is "sixteen billion, six hundred thirty-one million, eight hundred thirteen thousand, two hundred forty-three".