6416638788 has 72 divisors (see below), whose sum is σ = 17978467584. Its totient is φ = 1774180800.

The previous prime is 6416638771. The next prime is 6416638799. The reversal of 6416638788 is 8878366146.

It is a super-2 number, since 2×6416638788² = 82346506671332217888, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157783 + ... + 194238.

Almost surely, 2^6416638788 is an apocalyptic number.

It is an amenable number.

6416638788 is an abundant number, since it is smaller than the sum of its proper divisors (11561828796).

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

6416638788 is a wasteful number, since it uses less digits than its factorization.

6416638788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352073 (or 352064 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 57.

The square root of 6416638788 is about 80103.9249225654. The cubic root of 6416638788 is about 1858.2431080480.

The spelling of 6416638788 in words is "six billion, four hundred sixteen million, six hundred thirty-eight thousand, seven hundred eighty-eight".