16021112489 has 2 divisors, whose sum is σ = 16021112490. Its totient is φ = 16021112488.

The previous prime is 16021112453. The next prime is 16021112501. The reversal of 16021112489 is 98421112061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15931488400 + 89624089 = 126220^2 + 9467^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16021112489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16021114489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8010556244 + 8010556245.

It is an arithmetic number, because the mean of its divisors is an integer number (8010556245).

Almost surely, 2^16021112489 is an apocalyptic number.

It is an amenable number.

16021112489 is a deficient number, since it is larger than the sum of its proper divisors (1).

16021112489 is an equidigital number, since it uses as much as digits as its factorization.

16021112489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 35.

The spelling of 16021112489 in words is "sixteen billion, twenty-one million, one hundred twelve thousand, four hundred eighty-nine".