64043561364 has 192 divisors, whose sum is σ = 168949186560. Its totient is φ = 18783515520.

The previous prime is 64043561357. The next prime is 64043561431. The reversal of 64043561364 is 46316534046.

64043561364 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43068229 + ... + 43069715.

It is an arithmetic number, because the mean of its divisors is an integer number (879943680).

Almost surely, 2^64043561364 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 64043561364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84474593280).

64043561364 is an abundant number, since it is smaller than the sum of its proper divisors (104905625196).

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

64043561364 is a wasteful number, since it uses less digits than its factorization.

64043561364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770 (or 1768 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 64043561364 in words is "sixty-four billion, forty-three million, five hundred sixty-one thousand, three hundred sixty-four".