6641155616 has 48 divisors (see below), whose sum is σ = 13243908888. Its totient is φ = 3277824000.

The previous prime is 6641155603. The next prime is 6641155639. The reversal of 6641155616 is 6165511466.

It can be written as a sum of positive squares in 4 ways, for example, as 6616195600 + 24960016 = 81340^2 + 4996^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1137986 + ... + 1143806.

Almost surely, 2^6641155616 is an apocalyptic number.

It is an amenable number.

6641155616 is a deficient number, since it is larger than the sum of its proper divisors (6602753272).

6641155616 is a wasteful number, since it uses less digits than its factorization.

6641155616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6285 (or 6277 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The square root of 6641155616 is about 81493.2857111554. The cubic root of 6641155616 is about 1879.6683072585.

The spelling of 6641155616 in words is "six billion, six hundred forty-one million, one hundred fifty-five thousand, six hundred sixteen".