6553615664 has 10 divisors (see below), whose sum is σ = 12697630380. Its totient is φ = 3276807824.

The previous prime is 6553615637. The next prime is 6553615669. The reversal of 6553615664 is 4665163556.

It is not an unprimeable number, because it can be changed into a prime (6553615669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204800474 + ... + 204800505.

It is an arithmetic number, because the mean of its divisors is an integer number (1269763038).

Almost surely, 2^6553615664 is an apocalyptic number.

It is an amenable number.

6553615664 is a deficient number, since it is larger than the sum of its proper divisors (6144014716).

6553615664 is a wasteful number, since it uses less digits than its factorization.

6553615664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409600987 (or 409600981 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 47.

The square root of 6553615664 is about 80954.4048461849. The cubic root of 6553615664 is about 1871.3728433995.

The spelling of 6553615664 in words is "six billion, five hundred fifty-three million, six hundred fifteen thousand, six hundred sixty-four".