6446815000 has 40 divisors (see below), whose sum is σ = 15104899260. Its totient is φ = 2578724000.

The previous prime is 6446814977. The next prime is 6446815013. The reversal of 6446815000 is 5186446.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×6446815000² = 83122847288450000000, 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 (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 639682 + ... + 649681.

Almost surely, 2^6446815000 is an apocalyptic number.

It is an amenable number.

6446815000 is an abundant number, since it is smaller than the sum of its proper divisors (8658084260).

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

6446815000 is a wasteful number, since it uses less digits than its factorization.

6446815000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289389 (or 1289370 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 6446815000 is about 80292.0606286823. The cubic root of 6446815000 is about 1861.1515395952.

The spelling of 6446815000 in words is "six billion, four hundred forty-six million, eight hundred fifteen thousand".