16680239089 has 2 divisors, whose sum is σ = 16680239090. Its totient is φ = 16680239088.

The previous prime is 16680239087. The next prime is 16680239179. The reversal of 16680239089 is 98093208661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15053326864 + 1626912225 = 122692^2 + 40335^2 .

It is a cyclic number.

It is not a de Polignac number, because 16680239089 - 2¹ = 16680239087 is a prime.

Together with 16680239087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16680239087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8340119544 + 8340119545.

It is an arithmetic number, because the mean of its divisors is an integer number (8340119545).

Almost surely, 2^16680239089 is an apocalyptic number.

It is an amenable number.

16680239089 is a deficient number, since it is larger than the sum of its proper divisors (1).

16680239089 is an equidigital number, since it uses as much as digits as its factorization.

16680239089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 16680239089 in words is "sixteen billion, six hundred eighty million, two hundred thirty-nine thousand, eighty-nine".