6444917900 has 18 divisors (see below), whose sum is σ = 13985472060. Its totient is φ = 2577967120.

The previous prime is 6444917849. The next prime is 6444917903. The reversal of 6444917900 is 97194446.

It is not an unprimeable number, because it can be changed into a prime (6444917903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32224490 + ... + 32224689.

It is an arithmetic number, because the mean of its divisors is an integer number (776970670).

Almost surely, 2^6444917900 is an apocalyptic number.

It is an amenable number.

6444917900 is an abundant number, since it is smaller than the sum of its proper divisors (7540554160).

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

6444917900 is a wasteful number, since it uses less digits than its factorization.

6444917900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64449193 (or 64449186 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 6444917900 is about 80280.2460135742. The cubic root of 6444917900 is about 1860.9689617395.

The spelling of 6444917900 in words is "six billion, four hundred forty-four million, nine hundred seventeen thousand, nine hundred".