6464334646 has 64 divisors (see below), whose sum is σ = 12390174720. Its totient is φ = 2456532000.

The previous prime is 6464334607. The next prime is 6464334647.

It is a happy number.

6464334646 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6464334596 and 6464334605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6464334647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1187551 + ... + 1192981.

It is an arithmetic number, because the mean of its divisors is an integer number (193596480).

Almost surely, 2^6464334646 is an apocalyptic number.

6464334646 is a deficient number, since it is larger than the sum of its proper divisors (5925840074).

6464334646 is a wasteful number, since it uses less digits than its factorization.

6464334646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5641.

The product of its digits is 2985984, while the sum is 46.

The square root of 6464334646 is about 80401.0860996293. The cubic root of 6464334646 is about 1862.8359488045.

The spelling of 6464334646 in words is "six billion, four hundred sixty-four million, three hundred thirty-four thousand, six hundred forty-six".