6396445894 has 4 divisors (see below), whose sum is σ = 9594668844. Its totient is φ = 3198222946.

The previous prime is 6396445873. The next prime is 6396445897. The reversal of 6396445894 is 4985446936.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6396445897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1599111472 + ... + 1599111475.

It is an arithmetic number, because the mean of its divisors is an integer number (2398667211).

Almost surely, 2^6396445894 is an apocalyptic number.

6396445894 is a deficient number, since it is larger than the sum of its proper divisors (3198222950).

6396445894 is a wasteful number, since it uses less digits than its factorization.

6396445894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3198222949.

The product of its digits is 22394880, while the sum is 58.

The square root of 6396445894 is about 79977.7837527397. The cubic root of 6396445894 is about 1856.2917885834.

The spelling of 6396445894 in words is "six billion, three hundred ninety-six million, four hundred forty-five thousand, eight hundred ninety-four".