641855452 has 24 divisors (see below), whose sum is σ = 1284304896. Its totient is φ = 274953648.

The previous prime is 641855447. The next prime is 641855471. The reversal of 641855452 is 254558146.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

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, 80853 + ... + 88435.

It is an arithmetic number, because the mean of its divisors is an integer number (53512704).

Almost surely, 2^641855452 is an apocalyptic number.

It is an amenable number.

641855452 is an abundant number, since it is smaller than the sum of its proper divisors (642449444).

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

641855452 is a wasteful number, since it uses less digits than its factorization.

641855452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10617 (or 10615 counting only the distinct ones).

The product of its digits is 192000, while the sum is 40.

The square root of 641855452 is about 25334.8663308098. The cubic root of 641855452 is about 862.6058746177.

The spelling of 641855452 in words is "six hundred forty-one million, eight hundred fifty-five thousand, four hundred fifty-two".