641876066416 has 80 divisors (see below), whose sum is σ = 1410402263200. Its totient is φ = 280536182784.

The previous prime is 641876066411. The next prime is 641876066437. The reversal of 641876066416 is 614660678146.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641876066411) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9359740 + ... + 9428068.

It is an arithmetic number, because the mean of its divisors is an integer number (17630028290).

Almost surely, 2^641876066416 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 641876066416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (705201131600).

641876066416 is an abundant number, since it is smaller than the sum of its proper divisors (768526196784).

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

641876066416 is a wasteful number, since it uses less digits than its factorization.

641876066416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70746 (or 70740 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 641876066416 in words is "six hundred forty-one billion, eight hundred seventy-six million, sixty-six thousand, four hundred sixteen".