6445802164 has 24 divisors (see below), whose sum is σ = 11773577088. Its totient is φ = 3081994080.

The previous prime is 6445802149. The next prime is 6445802173. The reversal of 6445802164 is 4612085446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539374 + ... + 551194.

It is an arithmetic number, because the mean of its divisors is an integer number (490565712).

Almost surely, 2^6445802164 is an apocalyptic number.

It is an amenable number.

6445802164 is a deficient number, since it is larger than the sum of its proper divisors (5327774924).

6445802164 is a wasteful number, since it uses less digits than its factorization.

6445802164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17775 (or 17773 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 40.

The square root of 6445802164 is about 80285.7531819936. The cubic root of 6445802164 is about 1861.0540682078.

The spelling of 6445802164 in words is "six billion, four hundred forty-five million, eight hundred two thousand, one hundred sixty-four".