641850945912 has 480 divisors, whose sum is σ = 2039304960000. Its totient is φ = 188355404160.

The previous prime is 641850945893. The next prime is 641850945919. The reversal of 641850945912 is 219549058146.

641850945912 is a `hidden beast` number, since 6 + 4 + 1 + 8 + 509 + 45 + 91 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641850945919) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 428185339 + ... + 428186837.

It is an arithmetic number, because the mean of its divisors is an integer number (4248552000).

Almost surely, 2^641850945912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641850945912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1019652480000).

641850945912 is an abundant number, since it is smaller than the sum of its proper divisors (1397454014088).

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

641850945912 is a wasteful number, since it uses less digits than its factorization.

641850945912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709 (or 1685 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The spelling of 641850945912 in words is "six hundred forty-one billion, eight hundred fifty million, nine hundred forty-five thousand, nine hundred twelve".