6165640489 has 4 divisors (see below), whose sum is σ = 6167784960. Its totient is φ = 6163496020.

The previous prime is 6165640487. The next prime is 6165640513. The reversal of 6165640489 is 9840465616.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6165640489 - 2¹ = 6165640487 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6165640487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1067917 + ... + 1073674.

It is an arithmetic number, because the mean of its divisors is an integer number (1541946240).

Almost surely, 2^6165640489 is an apocalyptic number.

It is an amenable number.

6165640489 is a deficient number, since it is larger than the sum of its proper divisors (2144471).

6165640489 is a wasteful number, since it uses less digits than its factorization.

6165640489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144470.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The square root of 6165640489 is about 78521.5925016807. The cubic root of 6165640489 is about 1833.6906308321.

The spelling of 6165640489 in words is "six billion, one hundred sixty-five million, six hundred forty thousand, four hundred eighty-nine".