6415640128 has 28 divisors (see below), whose sum is σ = 12734625280. Its totient is φ = 3206915712.

The previous prime is 6415640093. The next prime is 6415640129. The reversal of 6415640128 is 8210465146.

It is not an unprimeable number, because it can be changed into a prime (6415640129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254125 + ... + 278227.

Almost surely, 2^6415640128 is an apocalyptic number.

It is an amenable number.

6415640128 is a deficient number, since it is larger than the sum of its proper divisors (6318985152).

6415640128 is a wasteful number, since it uses less digits than its factorization.

6415640128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28274 (or 28264 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 6415640128 is about 80097.6911527417. The cubic root of 6415640128 is about 1858.1466998709.

The spelling of 6415640128 in words is "six billion, four hundred fifteen million, six hundred forty thousand, one hundred twenty-eight".