6428881064 has 32 divisors (see below), whose sum is σ = 12607056000. Its totient is φ = 3067639872.

The previous prime is 6428881061. The next prime is 6428881099. The reversal of 6428881064 is 4601888246.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6428881061) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 40982 + ... + 120570.

It is an arithmetic number, because the mean of its divisors is an integer number (393970500).

Almost surely, 2^6428881064 is an apocalyptic number.

It is an amenable number.

6428881064 is a deficient number, since it is larger than the sum of its proper divisors (6178174936).

6428881064 is a wasteful number, since it uses less digits than its factorization.

6428881064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80057 (or 80053 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 47.

The square root of 6428881064 is about 80180.3034666245. The cubic root of 6428881064 is about 1859.4241351360.

The spelling of 6428881064 in words is "six billion, four hundred twenty-eight million, eight hundred eighty-one thousand, sixty-four".