6441406808 has 8 divisors (see below), whose sum is σ = 12077637780. Its totient is φ = 3220703400.

The previous prime is 6441406799. The next prime is 6441406817. The reversal of 6441406808 is 8086041446.

It is an interprime number because it is at equal distance from previous prime (6441406799) and next prime (6441406817).

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×6441406808² = 82983443332297497728, which contains 22 as substring.

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, 402587918 + ... + 402587933.

Almost surely, 2^6441406808 is an apocalyptic number.

It is an amenable number.

6441406808 is a deficient number, since it is larger than the sum of its proper divisors (5636230972).

6441406808 is a wasteful number, since it uses less digits than its factorization.

6441406808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805175857 (or 805175853 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 41.

The square root of 6441406808 is about 80258.3753137328. The cubic root of 6441406808 is about 1860.6309579437.

The spelling of 6441406808 in words is "six billion, four hundred forty-one million, four hundred six thousand, eight hundred eight".