641684522 has 8 divisors (see below), whose sum is σ = 986003172. Its totient is φ = 313016800.

The previous prime is 641684509. The next prime is 641684597. The reversal of 641684522 is 225486146.

641684522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 551263441 + 90421081 = 23479^2 + 9509^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3912629 + ... + 3912792.

Almost surely, 2^641684522 is an apocalyptic number.

641684522 is a deficient number, since it is larger than the sum of its proper divisors (344318650).

641684522 is a wasteful number, since it uses less digits than its factorization.

641684522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7825464.

The product of its digits is 92160, while the sum is 38.

The square root of 641684522 is about 25331.4926919043. The cubic root of 641684522 is about 862.5292954273.

The spelling of 641684522 in words is "six hundred forty-one million, six hundred eighty-four thousand, five hundred twenty-two".