641813052 has 24 divisors (see below), whose sum is σ = 1498766976. Its totient is φ = 213765808.

The previous prime is 641813041. The next prime is 641813069. The reversal of 641813052 is 250318146.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5448 + ... + 36239.

It is an arithmetic number, because the mean of its divisors is an integer number (62448624).

Almost surely, 2^641813052 is an apocalyptic number.

It is an amenable number.

641813052 is an abundant number, since it is smaller than the sum of its proper divisors (856953924).

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

641813052 is a wasteful number, since it uses less digits than its factorization.

641813052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42977 (or 42975 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 641813052 is about 25334.0295255216. The cubic root of 641813052 is about 862.5868800531.

The spelling of 641813052 in words is "six hundred forty-one million, eight hundred thirteen thousand, fifty-two".