16269767809 has 9 divisors (see below), whose sum is σ = 16370515497. Its totient is φ = 16169638704.

The previous prime is 16269767797. The next prime is 16269767819. The reversal of 16269767809 is 90876796261.

The square root of 16269767809 is 127553.

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 20657025 + 16249110784 = 4545^2 + 127472^2 .

It is not a de Polignac number, because 16269767809 - 2¹⁷ = 16269636737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16269767819) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 29209359 + ... + 29209915.

Almost surely, 2^16269767809 is an apocalyptic number.

16269767809 is the 127553-rd square number.

16269767809 is the 63777-th centered octagonal number.

It is an amenable number.

16269767809 is a deficient number, since it is larger than the sum of its proper divisors (100747688).

16269767809 is an frugal number, since it uses more digits than its factorization.

16269767809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572 (or 786 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 61.

The spelling of 16269767809 in words is "sixteen billion, two hundred sixty-nine million, seven hundred sixty-seven thousand, eight hundred nine".