6615615616 has 32 divisors (see below), whose sum is σ = 13229726400. Its totient is φ = 3295213824.

The previous prime is 6615615563. The next prime is 6615615641. The reversal of 6615615616 is 6165165166.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64596 + ... + 131923.

It is an arithmetic number, because the mean of its divisors is an integer number (413428950).

Almost surely, 2^6615615616 is an apocalyptic number.

It is an amenable number.

6615615616 is a deficient number, since it is larger than the sum of its proper divisors (6614110784).

6615615616 is a wasteful number, since it uses less digits than its factorization.

6615615616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196796 (or 196784 counting only the distinct ones).

The product of its digits is 194400, while the sum is 43.

The square root of 6615615616 is about 81336.4347386828. The cubic root of 6615615616 is about 1877.2556548402.

The spelling of 6615615616 in words is "six billion, six hundred fifteen million, six hundred fifteen thousand, six hundred sixteen".