641679822 has 48 divisors (see below), whose sum is σ = 1590387552. Its totient is φ = 183168000.

The previous prime is 641679821. The next prime is 641679833. The reversal of 641679822 is 228976146.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641679821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 212322 + ... + 215322.

It is an arithmetic number, because the mean of its divisors is an integer number (33133074).

Almost surely, 2^641679822 is an apocalyptic number.

641679822 is an abundant number, since it is smaller than the sum of its proper divisors (948707730).

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

641679822 is a wasteful number, since it uses less digits than its factorization.

641679822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4713 (or 4710 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 641679822 is about 25331.3999218361. The cubic root of 641679822 is about 862.5271895650.

The spelling of 641679822 in words is "six hundred forty-one million, six hundred seventy-nine thousand, eight hundred twenty-two".