646941376 has 14 divisors (see below), whose sum is σ = 1283774420. Its totient is φ = 323470656.

The previous prime is 646941353. The next prime is 646941377. The reversal of 646941376 is 673149646.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (646941377) by changing a digit.

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 as a sum of consecutive naturals, namely, 5054166 + ... + 5054293.

Almost surely, 2^646941376 is an apocalyptic number.

It is an amenable number.

646941376 is a deficient number, since it is larger than the sum of its proper divisors (636833044).

646941376 is a wasteful number, since it uses less digits than its factorization.

646941376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10108471 (or 10108461 counting only the distinct ones).

The product of its digits is 653184, while the sum is 46.

The square root of 646941376 is about 25435.0422842188. The cubic root of 646941376 is about 864.8782507652.

The spelling of 646941376 in words is "six hundred forty-six million, nine hundred forty-one thousand, three hundred seventy-six".