6464903688 has 48 divisors (see below), whose sum is σ = 17517724380. Its totient is φ = 2153908224.

The previous prime is 6464903639. The next prime is 6464903693. The reversal of 6464903688 is 8863094646.

6464903688 is a `hidden beast` number, since 6 + 46 + 490 + 36 + 88 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5010091524 + 1454812164 = 70782^2 + 38142^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132856 + ... + 174872.

Almost surely, 2^6464903688 is an apocalyptic number.

It is an amenable number.

6464903688 is an abundant number, since it is smaller than the sum of its proper divisors (11052820692).

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

6464903688 is a wasteful number, since it uses less digits than its factorization.

6464903688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44166 (or 44159 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The square root of 6464903688 is about 80404.6247923588. The cubic root of 6464903688 is about 1862.8906077318.

The spelling of 6464903688 in words is "six billion, four hundred sixty-four million, nine hundred three thousand, six hundred eighty-eight".