6438120680 has 16 divisors (see below), whose sum is σ = 14485771620. Its totient is φ = 2575248256.

The previous prime is 6438120679. The next prime is 6438120719. The reversal of 6438120680 is 860218346.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6421457956 + 16662724 = 80134^2 + 4082^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80476469 + ... + 80476548.

Almost surely, 2^6438120680 is an apocalyptic number.

It is an amenable number.

6438120680 is an abundant number, since it is smaller than the sum of its proper divisors (8047650940).

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

6438120680 is a wasteful number, since it uses less digits than its factorization.

6438120680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160953028 (or 160953024 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 6438120680 is about 80237.9005208885. The cubic root of 6438120680 is about 1860.3144995617.

The spelling of 6438120680 in words is "six billion, four hundred thirty-eight million, one hundred twenty thousand, six hundred eighty".