2185491489 has 8 divisors (see below), whose sum is σ = 2914719360. Its totient is φ = 1456628976.

The previous prime is 2185491481. The next prime is 2185491523. The reversal of 2185491489 is 9841945812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2185491489 - 2³ = 2185491481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2185491481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77062 + ... + 101535.

It is an arithmetic number, because the mean of its divisors is an integer number (364339920).

Almost surely, 2^2185491489 is an apocalyptic number.

It is an amenable number.

2185491489 is a deficient number, since it is larger than the sum of its proper divisors (729227871).

2185491489 is a wasteful number, since it uses less digits than its factorization.

2185491489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182679.

The product of its digits is 829440, while the sum is 51.

The square root of 2185491489 is about 46749.2405178950. The cubic root of 2185491489 is about 1297.7261016497.

The spelling of 2185491489 in words is "two billion, one hundred eighty-five million, four hundred ninety-one thousand, four hundred eighty-nine".