16623647687 has 2 divisors, whose sum is σ = 16623647688. Its totient is φ = 16623647686.

The previous prime is 16623647653. The next prime is 16623647717. The reversal of 16623647687 is 78674632661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16623647687 - 2⁸ = 16623647431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16623647587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8311823843 + 8311823844.

It is an arithmetic number, because the mean of its divisors is an integer number (8311823844).

Almost surely, 2^16623647687 is an apocalyptic number.

16623647687 is a deficient number, since it is larger than the sum of its proper divisors (1).

16623647687 is an equidigital number, since it uses as much as digits as its factorization.

16623647687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 56.

The spelling of 16623647687 in words is "sixteen billion, six hundred twenty-three million, six hundred forty-seven thousand, six hundred eighty-seven".