6445916 has 6 divisors (see below), whose sum is σ = 11280360. Its totient is φ = 3222956.

The previous prime is 6445871. The next prime is 6445919. The reversal of 6445916 is 6195446.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805736 + ... + 805743.

It is an arithmetic number, because the mean of its divisors is an integer number (1880060).

Almost surely, 2^6445916 is an apocalyptic number.

It is an amenable number.

6445916 is a deficient number, since it is larger than the sum of its proper divisors (4834444).

6445916 is a wasteful number, since it uses less digits than its factorization.

6445916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611483 (or 1611481 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 6445916 is about 2538.8808558103. The cubic root of 6445916 is about 186.1065023850.

The spelling of 6445916 in words is "six million, four hundred forty-five thousand, nine hundred sixteen".