641680122 has 64 divisors (see below), whose sum is σ = 1398096000. Its totient is φ = 195644160.

The previous prime is 641680111. The next prime is 641680183. The reversal of 641680122 is 221086146.

It is a self number, because there is not a number n which added to its sum of digits gives 641680122.

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 31 ways as a sum of consecutive naturals, for example, 627972 + ... + 628992.

It is an arithmetic number, because the mean of its divisors is an integer number (21845250).

Almost surely, 2^641680122 is an apocalyptic number.

641680122 is an abundant number, since it is smaller than the sum of its proper divisors (756415878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641680122 is a wasteful number, since it uses less digits than its factorization.

641680122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 641680122 is about 25331.4058433400. The cubic root of 641680122 is about 862.5273239821.

The spelling of 641680122 in words is "six hundred forty-one million, six hundred eighty thousand, one hundred twenty-two".