646847846 has 4 divisors (see below), whose sum is σ = 970271772. Its totient is φ = 323423922.

The previous prime is 646847743. The next prime is 646847863. The reversal of 646847846 is 648748646.

646847846 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161711960 + ... + 161711963.

It is an arithmetic number, because the mean of its divisors is an integer number (242567943).

Almost surely, 2^646847846 is an apocalyptic number.

646847846 is a deficient number, since it is larger than the sum of its proper divisors (323423926).

646847846 is a wasteful number, since it uses less digits than its factorization.

646847846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323423925.

The product of its digits is 6193152, while the sum is 53.

The square root of 646847846 is about 25433.2036126006. The cubic root of 646847846 is about 864.8365695226.

The spelling of 646847846 in words is "six hundred forty-six million, eight hundred forty-seven thousand, eight hundred forty-six".