16772161 has 12 divisors (see below), whose sum is σ = 19709460. Its totient is φ = 14229600.

The previous prime is 16772141. The next prime is 16772167. The reversal of 16772161 is 16127761.

It can be written as a sum of positive squares in 2 ways, for example, as 16200625 + 571536 = 4025^2 + 756^2 .

It is not a de Polignac number, because 16772161 - 2¹¹ = 16770113 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16772167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3255 + ... + 6643.

It is an arithmetic number, because the mean of its divisors is an integer number (1642455).

Almost surely, 2^16772161 is an apocalyptic number.

It is an amenable number.

16772161 is a deficient number, since it is larger than the sum of its proper divisors (2937299).

16772161 is a wasteful number, since it uses less digits than its factorization.

16772161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3504 (or 3497 counting only the distinct ones).

The product of its digits is 3528, while the sum is 31.

The square root of 16772161 is about 4095.3828880826. The cubic root of 16772161 is about 255.9742863577.

The spelling of 16772161 in words is "sixteen million, seven hundred seventy-two thousand, one hundred sixty-one".