6319688664 has 32 divisors (see below), whose sum is σ = 16728588720. Its totient is φ = 1982647296.

The previous prime is 6319688663. The next prime is 6319688717. The reversal of 6319688664 is 4668869136.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6319688663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7744309 + ... + 7745124.

Almost surely, 2^6319688664 is an apocalyptic number.

It is an amenable number.

6319688664 is an abundant number, since it is smaller than the sum of its proper divisors (10408900056).

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

6319688664 is a wasteful number, since it uses less digits than its factorization.

6319688664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15489459 (or 15489455 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 57.

The square root of 6319688664 is about 79496.4695065133. The cubic root of 6319688664 is about 1848.8367329309.

The spelling of 6319688664 in words is "six billion, three hundred nineteen million, six hundred eighty-eight thousand, six hundred sixty-four".