6464631768 has 64 divisors (see below), whose sum is σ = 18677952000. Its totient is φ = 1826280192.

The previous prime is 6464631743. The next prime is 6464631791. The reversal of 6464631768 is 8671364646.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 6464631768.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201228 + ... + 231131.

It is an arithmetic number, because the mean of its divisors is an integer number (291843000).

Almost surely, 2^6464631768 is an apocalyptic number.

It is an amenable number.

6464631768 is an abundant number, since it is smaller than the sum of its proper divisors (12213320232).

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

6464631768 is a wasteful number, since it uses less digits than its factorization.

6464631768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432464 (or 432460 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 51.

The square root of 6464631768 is about 80402.9338270688. The cubic root of 6464631768 is about 1862.8644890484.

The spelling of 6464631768 in words is "six billion, four hundred sixty-four million, six hundred thirty-one thousand, seven hundred sixty-eight".