646675412 has 24 divisors (see below), whose sum is σ = 1192228800. Its totient is φ = 306066816.

The previous prime is 646675361. The next prime is 646675451. The reversal of 646675412 is 214576646.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 646675412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115289 + ... + 120767.

It is an arithmetic number, because the mean of its divisors is an integer number (49676200).

Almost surely, 2^646675412 is an apocalyptic number.

It is an amenable number.

646675412 is a deficient number, since it is larger than the sum of its proper divisors (545553388).

646675412 is a wasteful number, since it uses less digits than its factorization.

646675412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7055 (or 7053 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 646675412 is about 25429.8134479984. The cubic root of 646675412 is about 864.7597145182.

The spelling of 646675412 in words is "six hundred forty-six million, six hundred seventy-five thousand, four hundred twelve".