6649863296 has 32 divisors (see below), whose sum is σ = 13255332480. Its totient is φ = 3323034880.

The previous prime is 6649863281. The next prime is 6649863301. The reversal of 6649863296 is 6923689466.

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, 225605 + ... + 253371.

It is an arithmetic number, because the mean of its divisors is an integer number (414229140).

Almost surely, 2^6649863296 is an apocalyptic number.

It is an amenable number.

6649863296 is a deficient number, since it is larger than the sum of its proper divisors (6605469184).

6649863296 is a wasteful number, since it uses less digits than its factorization.

6649863296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29652 (or 29640 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 59.

The square root of 6649863296 is about 81546.6939611901. The cubic root of 6649863296 is about 1880.4894696552.

The spelling of 6649863296 in words is "six billion, six hundred forty-nine million, eight hundred sixty-three thousand, two hundred ninety-six".