43991789660 has 96 divisors (see below), whose sum is σ = 114104965632. Its totient is φ = 13873317120.

The previous prime is 43991789629. The next prime is 43991789671. The reversal of 43991789660 is 6698719934.

43991789660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 43991789593 and 43991789602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 472355 + ... + 557765.

It is an arithmetic number, because the mean of its divisors is an integer number (1188593392).

Almost surely, 2^43991789660 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 43991789660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57052482816).

43991789660 is an abundant number, since it is smaller than the sum of its proper divisors (70113175972).

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

43991789660 is a wasteful number, since it uses less digits than its factorization.

43991789660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85723 (or 85721 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 62.

The spelling of 43991789660 in words is "forty-three billion, nine hundred ninety-one million, seven hundred eighty-nine thousand, six hundred sixty".