16268889389 has 2 divisors, whose sum is σ = 16268889390. Its totient is φ = 16268889388.

The previous prime is 16268889367. The next prime is 16268889457. The reversal of 16268889389 is 98398886261.

It is an a-pointer prime, because the next prime (16268889457) can be obtained adding 16268889389 to its sum of digits (68).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12436041289 + 3832848100 = 111517^2 + 61910^2 .

It is a cyclic number.

It is not a de Polignac number, because 16268889389 - 2²⁸ = 16000453933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16268880389) 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, 8134444694 + 8134444695.

It is an arithmetic number, because the mean of its divisors is an integer number (8134444695).

Almost surely, 2^16268889389 is an apocalyptic number.

It is an amenable number.

16268889389 is a deficient number, since it is larger than the sum of its proper divisors (1).

16268889389 is an equidigital number, since it uses as much as digits as its factorization.

16268889389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71663616, while the sum is 68.

The spelling of 16268889389 in words is "sixteen billion, two hundred sixty-eight million, eight hundred eighty-nine thousand, three hundred eighty-nine".