6415640504 has 32 divisors (see below), whose sum is σ = 14805325920. Its totient is φ = 2538055296.

The previous prime is 6415640423. The next prime is 6415640509. The reversal of 6415640504 is 4050465146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6415640509) 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, 4405619 + ... + 4407074.

It is an arithmetic number, because the mean of its divisors is an integer number (462666435).

Almost surely, 2^6415640504 is an apocalyptic number.

It is an amenable number.

6415640504 is an abundant number, since it is smaller than the sum of its proper divisors (8389685416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6415640504 is a wasteful number, since it uses less digits than its factorization.

6415640504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8812719 (or 8812715 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 6415640504 is about 80097.6934998755. The cubic root of 6415640504 is about 1858.1467361709.

The spelling of 6415640504 in words is "six billion, four hundred fifteen million, six hundred forty thousand, five hundred four".