6440600216 has 16 divisors (see below), whose sum is σ = 12077431800. Its totient is φ = 3219951744.

The previous prime is 6440600191. The next prime is 6440600237. The reversal of 6440600216 is 6120060446.

It is a super-2 number, since 2×6440600216² = 82962662284678493312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45815 + ... + 122393.

Almost surely, 2^6440600216 is an apocalyptic number.

It is an amenable number.

6440600216 is a deficient number, since it is larger than the sum of its proper divisors (5636831584).

6440600216 is a wasteful number, since it uses less digits than its factorization.

6440600216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87098 (or 87094 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 6440600216 is about 80253.3501855219. The cubic root of 6440600216 is about 1860.5532920582.

The spelling of 6440600216 in words is "six billion, four hundred forty million, six hundred thousand, two hundred sixteen".