641481849680 has 120 divisors (see below), whose sum is σ = 1739783111040. Its totient is φ = 219323516160.

The previous prime is 641481849653. The next prime is 641481849691. The reversal of 641481849680 is 86948184146.

It is a super-2 number, since 2×641481849680² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1179365 + ... + 1635195.

It is an arithmetic number, because the mean of its divisors is an integer number (14498192592).

Almost surely, 2^641481849680 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 641481849680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (869891555520).

641481849680 is an abundant number, since it is smaller than the sum of its proper divisors (1098301261360).

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

641481849680 is a wasteful number, since it uses less digits than its factorization.

641481849680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456217 (or 456204 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 59.

The spelling of 641481849680 in words is "six hundred forty-one billion, four hundred eighty-one million, eight hundred forty-nine thousand, six hundred eighty".