6464903690 has 48 divisors (see below), whose sum is σ = 13605634152. Its totient is φ = 2205254016.

The previous prime is 6464903639. The next prime is 6464903693. The reversal of 6464903690 is 963094646.

It can be written as a sum of positive squares in 4 ways, for example, as 5938705969 + 526197721 = 77063^2 + 22939^2 .

It is a super-2 number, since 2×6464903690² = 83589959441951232200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6464903693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63044 + ... + 130016.

Almost surely, 2^6464903690 is an apocalyptic number.

6464903690 is an abundant number, since it is smaller than the sum of its proper divisors (7140730462).

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

6464903690 is a wasteful number, since it uses less digits than its factorization.

6464903690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67191 (or 67184 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 47.

The square root of 6464903690 is about 80404.6248047959. The cubic root of 6464903690 is about 1862.8906079239.

The spelling of 6464903690 in words is "six billion, four hundred sixty-four million, nine hundred three thousand, six hundred ninety".