16128769 has 2 divisors, whose sum is σ = 16128770. Its totient is φ = 16128768.

The previous prime is 16128757. The next prime is 16128799. The reversal of 16128769 is 96782161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15840400 + 288369 = 3980^2 + 537^2 .

It is a cyclic number.

It is not a de Polignac number, because 16128769 - 2¹⁵ = 16096001 is a prime.

It is a super-2 number, since 2×16128769² = 520274378910722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16128799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8064384 + 8064385.

It is an arithmetic number, because the mean of its divisors is an integer number (8064385).

Almost surely, 2^16128769 is an apocalyptic number.

It is an amenable number.

16128769 is a deficient number, since it is larger than the sum of its proper divisors (1).

16128769 is an equidigital number, since it uses as much as digits as its factorization.

16128769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 16128769 is about 4016.0638690140. The cubic root of 16128769 is about 252.6583994513.

The spelling of 16128769 in words is "sixteen million, one hundred twenty-eight thousand, seven hundred sixty-nine".