646364146 has 8 divisors (see below), whose sum is σ = 969967404. Its totient is φ = 323041680.

The previous prime is 646364129. The next prime is 646364149. The reversal of 646364146 is 641463646.

It can be written as a sum of positive squares in 2 ways, for example, as 584914225 + 61449921 = 24185^2 + 7839^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 646364099 and 646364108.

It is not an unprimeable number, because it can be changed into a prime (646364149) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 64345 + ... + 73708.

Almost surely, 2^646364146 is an apocalyptic number.

646364146 is a deficient number, since it is larger than the sum of its proper divisors (323603258).

646364146 is a wasteful number, since it uses less digits than its factorization.

646364146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140396.

The product of its digits is 248832, while the sum is 40.

The square root of 646364146 is about 25423.6926114206. The cubic root of 646364146 is about 864.6209465517.

The spelling of 646364146 in words is "six hundred forty-six million, three hundred sixty-four thousand, one hundred forty-six".