6447579788 has 48 divisors (see below), whose sum is σ = 12974497536. Its totient is φ = 2780205120.

The previous prime is 6447579751. The next prime is 6447579829. The reversal of 6447579788 is 8879757446.

It is a super-2 number, since 2×6447579788² = 83142570245252249888, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 11258 + ... + 114113.

It is an arithmetic number, because the mean of its divisors is an integer number (270302032).

Almost surely, 2^6447579788 is an apocalyptic number.

It is an amenable number.

6447579788 is an abundant number, since it is smaller than the sum of its proper divisors (6526917748).

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

6447579788 is a wasteful number, since it uses less digits than its factorization.

6447579788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125454 (or 125452 counting only the distinct ones).

The product of its digits is 94832640, while the sum is 65.

The square root of 6447579788 is about 80296.8230255718. The cubic root of 6447579788 is about 1861.2251330457.

The spelling of 6447579788 in words is "six billion, four hundred forty-seven million, five hundred seventy-nine thousand, seven hundred eighty-eight".