641378222 has 16 divisors (see below), whose sum is σ = 966416352. Its totient is φ = 319243680.

The previous prime is 641378201. The next prime is 641378263. The reversal of 641378222 is 222873146.

It is a super-3 number, since 3×641378222³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 662783 + ... + 663749.

It is an arithmetic number, because the mean of its divisors is an integer number (60401022).

Almost surely, 2^641378222 is an apocalyptic number.

641378222 is a deficient number, since it is larger than the sum of its proper divisors (325038130).

641378222 is a wasteful number, since it uses less digits than its factorization.

641378222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123.

The product of its digits is 32256, while the sum is 35.

The square root of 641378222 is about 25325.4461362480. The cubic root of 641378222 is about 862.3920344308.

The spelling of 641378222 in words is "six hundred forty-one million, three hundred seventy-eight thousand, two hundred twenty-two".