6445867516 has 12 divisors (see below), whose sum is σ = 12305747160. Its totient is φ = 2929939760.

The previous prime is 6445867501. The next prime is 6445867609. The reversal of 6445867516 is 6157685446.

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 3 ways as a sum of consecutive naturals, for example, 73248451 + ... + 73248538.

It is an arithmetic number, because the mean of its divisors is an integer number (1025478930).

Almost surely, 2^6445867516 is an apocalyptic number.

It is an amenable number.

6445867516 is a deficient number, since it is larger than the sum of its proper divisors (5859879644).

6445867516 is a wasteful number, since it uses less digits than its factorization.

6445867516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146497004 (or 146497002 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 52.

The square root of 6445867516 is about 80286.1601772061. The cubic root of 6445867516 is about 1861.0603577376.

The spelling of 6445867516 in words is "six billion, four hundred forty-five million, eight hundred sixty-seven thousand, five hundred sixteen".