43165465021849 has 9 divisors (see below), whose sum is σ = 43498355024959. Its totient is φ = 42835103549680.

The previous prime is 43165465021837. The next prime is 43165465021867. The reversal of 43165465021849 is 94812056456134.

The square root of 43165465021849 is 6570043.

It is a perfect power (a square), and thus also a powerful number.

43165465021849 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 only one way, i.e., 22706416265625 + 20459048756224 = 4765125^2 + 4523168^2 .

It is not a de Polignac number, because 43165465021849 - 2¹⁵ = 43165464989081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43165465021793 and 43165465021802.

It is not an unprimeable number, because it can be changed into a prime (43165465021249) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 860650557 + ... + 860700709.

Almost surely, 2^{43165465021849} is an apocalyptic number.

43165465021849 is the 6570043-rd square number.

43165465021849 is the 3285022-nd centered octagonal number.

It is an amenable number.

43165465021849 is a deficient number, since it is larger than the sum of its proper divisors (332890003110).

43165465021849 is an frugal number, since it uses more digits than its factorization.

43165465021849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100568 (or 50284 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 58.

The spelling of 43165465021849 in words is "forty-three trillion, one hundred sixty-five billion, four hundred sixty-five million, twenty-one thousand, eight hundred forty-nine".