671541822 has 48 divisors (see below), whose sum is σ = 1669131360. Its totient is φ = 191146176.

The previous prime is 671541821. The next prime is 671541851. The reversal of 671541822 is 228145176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671541821) 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, 23988 + ... + 43800.

It is an arithmetic number, because the mean of its divisors is an integer number (34773570).

Almost surely, 2^671541822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671541822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (834565680).

671541822 is an abundant number, since it is smaller than the sum of its proper divisors (997589538).

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

671541822 is a wasteful number, since it uses less digits than its factorization.

671541822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20097 (or 20094 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 671541822 is about 25914.1239867374. The cubic root of 671541822 is about 875.7047153253.

Adding to 671541822 its reverse (228145176), we get a palindrome (899686998).

The spelling of 671541822 in words is "six hundred seventy-one million, five hundred forty-one thousand, eight hundred twenty-two".