16261189 has 12 divisors (see below), whose sum is σ = 18999468. Its totient is φ = 13876800.

The previous prime is 16261187. The next prime is 16261211. The reversal of 16261189 is 98116261.

It can be written as a sum of positive squares in 2 ways, for example, as 13198689 + 3062500 = 3633^2 + 1750^2 .

It is not a de Polignac number, because 16261189 - 2¹ = 16261187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16261183) 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, 13179 + ... + 14359.

It is an arithmetic number, because the mean of its divisors is an integer number (1583289).

Almost surely, 2^16261189 is an apocalyptic number.

It is an amenable number.

16261189 is a deficient number, since it is larger than the sum of its proper divisors (2738279).

16261189 is a wasteful number, since it uses less digits than its factorization.

16261189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476 (or 1469 counting only the distinct ones).

The product of its digits is 5184, while the sum is 34.

The square root of 16261189 is about 4032.5164599788. The cubic root of 16261189 is about 253.3479721842.

The spelling of 16261189 in words is "sixteen million, two hundred sixty-one thousand, one hundred eighty-nine".