64471181918808 has 256 divisors, whose sum is σ = 195631680061440. Its totient is φ = 17313509721600.

The previous prime is 64471181918789. The next prime is 64471181918827. The reversal of 64471181918808 is 80881918117446.

64471181918808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64471181918789) and next prime (64471181918827).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 108190713 + ... + 108784983.

It is an arithmetic number, because the mean of its divisors is an integer number (764186250240).

Almost surely, 2^{64471181918808} 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 64471181918808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97815840030720).

64471181918808 is an abundant number, since it is smaller than the sum of its proper divisors (131160498142632).

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

64471181918808 is a wasteful number, since it uses less digits than its factorization.

64471181918808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594918 (or 594914 counting only the distinct ones).

The product of its (nonzero) digits is 24772608, while the sum is 66.

The spelling of 64471181918808 in words is "sixty-four trillion, four hundred seventy-one billion, one hundred eighty-one million, nine hundred eighteen thousand, eight hundred eight".