641703344500 has 96 divisors (see below), whose sum is σ = 1407497180544. Its totient is φ = 255581568000.

The previous prime is 641703344489. The next prime is 641703344501. The reversal of 641703344500 is 5443307146.

It is a self number, because there is not a number n which added to its sum of digits gives 641703344500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641703344501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 143139259 + ... + 143143741.

It is an arithmetic number, because the mean of its divisors is an integer number (14661428964).

Almost surely, 2^641703344500 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 641703344500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (703748590272).

641703344500 is an abundant number, since it is smaller than the sum of its proper divisors (765793836044).

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

641703344500 is a wasteful number, since it uses less digits than its factorization.

641703344500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5666 (or 5654 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 37.

The spelling of 641703344500 in words is "six hundred forty-one billion, seven hundred three million, three hundred forty-four thousand, five hundred".