6405615016 has 32 divisors (see below), whose sum is σ = 12058452000. Its totient is φ = 3190055616.

The previous prime is 6405614993. The next prime is 6405615019. The reversal of 6405615016 is 6105165046.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6405615019) 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, 2938615 + ... + 2940793.

It is an arithmetic number, because the mean of its divisors is an integer number (376826625).

Almost surely, 2^6405615016 is an apocalyptic number.

It is an amenable number.

6405615016 is a deficient number, since it is larger than the sum of its proper divisors (5652836984).

6405615016 is a wasteful number, since it uses less digits than its factorization.

6405615016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481 (or 3477 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 6405615016 is about 80035.0861560104. The cubic root of 6405615016 is about 1857.1783454723.

The spelling of 6405615016 in words is "six billion, four hundred five million, six hundred fifteen thousand, sixteen".