43783685664 has 96 divisors (see below), whose sum is σ = 117867435840. Its totient is φ = 14223347712.

The previous prime is 43783685641. The next prime is 43783685669. The reversal of 43783685664 is 46658638734.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×43783685664² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43783685598 and 43783685607.

It is not an unprimeable number, because it can be changed into a prime (43783685669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1874892 + ... + 1898100.

It is an arithmetic number, because the mean of its divisors is an integer number (1227785790).

Almost surely, 2^43783685664 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 43783685664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58933717920).

43783685664 is an abundant number, since it is smaller than the sum of its proper divisors (74083750176).

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

43783685664 is a wasteful number, since it uses less digits than its factorization.

43783685664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23722 (or 23714 counting only the distinct ones).

The product of its digits is 69672960, while the sum is 60.

The spelling of 43783685664 in words is "forty-three billion, seven hundred eighty-three million, six hundred eighty-five thousand, six hundred sixty-four".