6440460464 has 40 divisors (see below), whose sum is σ = 12648000000. Its totient is φ = 3176536896.

The previous prime is 6440460451. The next prime is 6440460469. The reversal of 6440460464 is 4640640446.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6440460469) 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 7 ways as a sum of consecutive naturals, for example, 2146037 + ... + 2149035.

It is an arithmetic number, because the mean of its divisors is an integer number (316200000).

Almost surely, 2^6440460464 is an apocalyptic number.

It is an amenable number.

6440460464 is a deficient number, since it is larger than the sum of its proper divisors (6207539536).

6440460464 is a wasteful number, since it uses less digits than its factorization.

6440460464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4785 (or 4779 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 38.

The square root of 6440460464 is about 80252.4794881753. The cubic root of 6440460464 is about 1860.5398348277.

The spelling of 6440460464 in words is "six billion, four hundred forty million, four hundred sixty thousand, four hundred sixty-four".