6405662464 has 18 divisors (see below), whose sum is σ = 12786303320. Its totient is φ = 3202831104.

The previous prime is 6405662447. The next prime is 6405662491. The reversal of 6405662464 is 4642665046.

It is a self number, because there is not a number n which added to its sum of digits gives 6405662464.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12510804 + ... + 12511315.

Almost surely, 2^6405662464 is an apocalyptic number.

6405662464 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6405662464 is a deficient number, since it is larger than the sum of its proper divisors (6380640856).

6405662464 is an equidigital number, since it uses as much as digits as its factorization.

6405662464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25022135 (or 25022121 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 43.

The square root of 6405662464 is about 80035.3825754585. The cubic root of 6405662464 is about 1857.1829309899.

The spelling of 6405662464 in words is "six billion, four hundred five million, six hundred sixty-two thousand, four hundred sixty-four".