6440516588 has 12 divisors (see below), whose sum is σ = 12295531752. Its totient is φ = 2927507520.

The previous prime is 6440516581. The next prime is 6440516609. The reversal of 6440516588 is 8856150446.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6440516581) by changing a digit.

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, 73187645 + ... + 73187732.

It is an arithmetic number, because the mean of its divisors is an integer number (1024627646).

Almost surely, 2^6440516588 is an apocalyptic number.

It is an amenable number.

6440516588 is a deficient number, since it is larger than the sum of its proper divisors (5855015164).

6440516588 is a wasteful number, since it uses less digits than its factorization.

6440516588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146375392 (or 146375390 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 47.

The square root of 6440516588 is about 80252.8291588527. The cubic root of 6440516588 is about 1860.5452392360.

The spelling of 6440516588 in words is "six billion, four hundred forty million, five hundred sixteen thousand, five hundred eighty-eight".