43645395664 has 20 divisors (see below), whose sum is σ = 91067797156. Its totient is φ = 20144028672.

The previous prime is 43645395637. The next prime is 43645395683. The reversal of 43645395664 is 46659354634.

43645395664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1828417600 + 41816978064 = 42760^2 + 204492^2 .

It is a super-2 number, since 2×43645395664² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104916609 + ... + 104917024.

Almost surely, 2^43645395664 is an apocalyptic number.

It is an amenable number.

43645395664 is an abundant number, since it is smaller than the sum of its proper divisors (47422401492).

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

43645395664 is a wasteful number, since it uses less digits than its factorization.

43645395664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209833654 (or 209833648 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 55.

The spelling of 43645395664 in words is "forty-three billion, six hundred forty-five million, three hundred ninety-five thousand, six hundred sixty-four".