6446500988 has 24 divisors (see below), whose sum is σ = 11352433680. Its totient is φ = 3202974720.

The previous prime is 6446500979. The next prime is 6446500993. The reversal of 6446500988 is 8890056446.

It is a happy number.

It is a super-2 number, since 2×6446500988² = 83114749976569952288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1510778 + ... + 1515038.

It is an arithmetic number, because the mean of its divisors is an integer number (473018070).

Almost surely, 2^6446500988 is an apocalyptic number.

It is an amenable number.

6446500988 is a deficient number, since it is larger than the sum of its proper divisors (4905932692).

6446500988 is a wasteful number, since it uses less digits than its factorization.

6446500988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6557 (or 6555 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 50.

The square root of 6446500988 is about 80290.1051686944. The cubic root of 6446500988 is about 1861.1213213967.

The spelling of 6446500988 in words is "six billion, four hundred forty-six million, five hundred thousand, nine hundred eighty-eight".