16227447769 has 27 divisors (see below), whose sum is σ = 18086439549. Its totient is φ = 14552690880.

The previous prime is 16227447763. The next prime is 16227447787. The reversal of 16227447769 is 96774472261.

The square root of 16227447769 is 127387.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 10808721225 + 5418726544 = 103965^2 + 73612^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16227447769 is a prime.

It is a super-2 number, since 2×16227447769² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16227447763) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 67897152 + ... + 67897390.

Almost surely, 2^16227447769 is an apocalyptic number.

16227447769 is the 127387-th square number.

16227447769 is the 63694-th centered octagonal number.

It is an amenable number.

16227447769 is a deficient number, since it is larger than the sum of its proper divisors (1858991780).

16227447769 is an frugal number, since it uses more digits than its factorization.

16227447769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 293 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 55.

The spelling of 16227447769 in words is "sixteen billion, two hundred twenty-seven million, four hundred forty-seven thousand, seven hundred sixty-nine".