6447768804 has 63 divisors (see below), whose sum is σ = 16929038707. Its totient is φ = 2147810904.

The previous prime is 6447768757. The next prime is 6447768809. The reversal of 6447768804 is 4088677446.

The square root of 6447768804 is 80298.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6447768809) 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 20 ways as a sum of consecutive naturals, for example, 4335349 + ... + 4336835.

Almost surely, 2^6447768804 is an apocalyptic number.

6447768804 is the 80298-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6447768804

6447768804 is an abundant number, since it is smaller than the sum of its proper divisors (10481269903).

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

6447768804 is an frugal number, since it uses more digits than its factorization.

6447768804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2996 (or 1492 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 54.

The cubic root of 6447768804 is about 1861.2433206398.

The spelling of 6447768804 in words is "six billion, four hundred forty-seven million, seven hundred sixty-eight thousand, eight hundred four".