16010505989 has 2 divisors, whose sum is σ = 16010505990. Its totient is φ = 16010505988.

The previous prime is 16010505911. The next prime is 16010506013. The reversal of 16010505989 is 98950501061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9993401089 + 6017104900 = 99967^2 + 77570^2 .

It is a cyclic number.

It is not a de Polignac number, because 16010505989 - 2⁸ = 16010505733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16010501989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8005252994 + 8005252995.

It is an arithmetic number, because the mean of its divisors is an integer number (8005252995).

Almost surely, 2^16010505989 is an apocalyptic number.

It is an amenable number.

16010505989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16010505989 is an equidigital number, since it uses as much as digits as its factorization.

16010505989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 44.

The spelling of 16010505989 in words is "sixteen billion, ten million, five hundred five thousand, nine hundred eighty-nine".