6464165688 has 32 divisors (see below), whose sum is σ = 17956016400. Its totient is φ = 2154721824.

The previous prime is 6464165683. The next prime is 6464165699. The reversal of 6464165688 is 8865614646.

6464165688 is a `hidden beast` number, since 6 + 4 + 64 + 16 + 568 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6464165681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14963131 + ... + 14963562.

Almost surely, 2^6464165688 is an apocalyptic number.

It is an amenable number.

6464165688 is an abundant number, since it is smaller than the sum of its proper divisors (11491850712).

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

6464165688 is a wasteful number, since it uses less digits than its factorization.

6464165688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29926708 (or 29926698 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The square root of 6464165688 is about 80400.0353731265. The cubic root of 6464165688 is about 1862.8197190456.

The spelling of 6464165688 in words is "six billion, four hundred sixty-four million, one hundred sixty-five thousand, six hundred eighty-eight".