641373198 has 16 divisors (see below), whose sum is σ = 1324125696. Its totient is φ = 206894520.

The previous prime is 641373181. The next prime is 641373211. The reversal of 641373198 is 891373146.

It is a super-2 number, since 2×641373198² = 822719158225494408, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1723936 + ... + 1724307.

It is an arithmetic number, because the mean of its divisors is an integer number (82757856).

Almost surely, 2^641373198 is an apocalyptic number.

641373198 is an abundant number, since it is smaller than the sum of its proper divisors (682752498).

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

641373198 is a wasteful number, since it uses less digits than its factorization.

641373198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3448279.

The product of its digits is 108864, while the sum is 42.

The square root of 641373198 is about 25325.3469472779. The cubic root of 641373198 is about 862.3897826815.

The spelling of 641373198 in words is "six hundred forty-one million, three hundred seventy-three thousand, one hundred ninety-eight".