6446222646 has 16 divisors (see below), whose sum is σ = 13308331008. Its totient is φ = 2079426600.

The previous prime is 6446222603. The next prime is 6446222647. The reversal of 6446222646 is 6462226446.

It is a junction number, because it is equal to n+sod(n) for n = 6446222598 and 6446222607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446222647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17328370 + ... + 17328741.

It is an arithmetic number, because the mean of its divisors is an integer number (831770688).

Almost surely, 2^6446222646 is an apocalyptic number.

6446222646 is an abundant number, since it is smaller than the sum of its proper divisors (6862108362).

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

6446222646 is a wasteful number, since it uses less digits than its factorization.

6446222646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34657147.

The product of its digits is 663552, while the sum is 42.

The square root of 6446222646 is about 80288.3717981627. The cubic root of 6446222646 is about 1861.0945349954.

The spelling of 6446222646 in words is "six billion, four hundred forty-six million, two hundred twenty-two thousand, six hundred forty-six".