6446808645 has 8 divisors (see below), whose sum is σ = 10314893856. Its totient is φ = 3438297936.

The previous prime is 6446808617. The next prime is 6446808653. The reversal of 6446808645 is 5468086446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6446808645 - 2¹⁸ = 6446546501 is a prime.

It is a super-2 number, since 2×6446808645² = 83122683410493472050, 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214893607 + ... + 214893636.

It is an arithmetic number, because the mean of its divisors is an integer number (1289361732).

Almost surely, 2^6446808645 is an apocalyptic number.

It is an amenable number.

6446808645 is a deficient number, since it is larger than the sum of its proper divisors (3868085211).

6446808645 is a wasteful number, since it uses less digits than its factorization.

6446808645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429787251.

The product of its (nonzero) digits is 4423680, while the sum is 51.

The square root of 6446808645 is about 80292.0210543987. The cubic root of 6446808645 is about 1861.1509280466.

The spelling of 6446808645 in words is "six billion, four hundred forty-six million, eight hundred eight thousand, six hundred forty-five".