16678638839 has 2 divisors, whose sum is σ = 16678638840. Its totient is φ = 16678638838.

The previous prime is 16678638799. The next prime is 16678638877. The reversal of 16678638839 is 93883687661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16678638839 - 2²⁰ = 16677590263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16678638139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8339319419 + 8339319420.

It is an arithmetic number, because the mean of its divisors is an integer number (8339319420).

Almost surely, 2^16678638839 is an apocalyptic number.

16678638839 is a deficient number, since it is larger than the sum of its proper divisors (1).

16678638839 is an equidigital number, since it uses as much as digits as its factorization.

16678638839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62705664, while the sum is 65.

The spelling of 16678638839 in words is "sixteen billion, six hundred seventy-eight million, six hundred thirty-eight thousand, eight hundred thirty-nine".