646324413 has 16 divisors (see below), whose sum is σ = 986896896. Its totient is φ = 368570160.

The previous prime is 646324397. The next prime is 646324433. The reversal of 646324413 is 314423646.

It is not a de Polignac number, because 646324413 - 2⁴ = 646324397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646324433) 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 in 15 ways as a sum of consecutive naturals, for example, 21031 + ... + 41652.

It is an arithmetic number, because the mean of its divisors is an integer number (61681056).

Almost surely, 2^646324413 is an apocalyptic number.

It is an amenable number.

646324413 is a deficient number, since it is larger than the sum of its proper divisors (340572483).

646324413 is a wasteful number, since it uses less digits than its factorization.

646324413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63184.

The product of its digits is 41472, while the sum is 33.

The square root of 646324413 is about 25422.9111826321. The cubic root of 646324413 is about 864.6032296614.

It can be divided in two parts, 6463 and 24413, that added together give a triangular number (30876 = T₂₄₈).

The spelling of 646324413 in words is "six hundred forty-six million, three hundred twenty-four thousand, four hundred thirteen".