6464884646 has 32 divisors (see below), whose sum is σ = 10981370880. Its totient is φ = 2827850400.

The previous prime is 6464884631. The next prime is 6464884649.

6464884646 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6464884591 and 6464884600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6464884649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95600 + ... + 148556.

It is an arithmetic number, because the mean of its divisors is an integer number (343167840).

Almost surely, 2^6464884646 is an apocalyptic number.

6464884646 is a deficient number, since it is larger than the sum of its proper divisors (4516486234).

6464884646 is a wasteful number, since it uses less digits than its factorization.

6464884646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53180.

The product of its digits is 21233664, while the sum is 56.

The square root of 6464884646 is about 80404.5063786850. The cubic root of 6464884646 is about 1862.8887787178. Note that the first 3 decimals are identical.

The spelling of 6464884646 in words is "six billion, four hundred sixty-four million, eight hundred eighty-four thousand, six hundred forty-six".