43686454420240 has 20 divisors (see below), whose sum is σ = 101571006527244. Its totient is φ = 17474581768064.

The previous prime is 43686454420229. The next prime is 43686454420241. The reversal of 43686454420240 is 4202445468634.

43686454420240 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 11686525125136 + 31999929295104 = 3418556^2 + 5656848^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (43686454420241) 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 3 ways as a sum of consecutive naturals, for example, 273040340047 + ... + 273040340206.

Almost surely, 2^{43686454420240} is an apocalyptic number.

43686454420240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43686454420240 is an abundant number, since it is smaller than the sum of its proper divisors (57884552107004).

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

43686454420240 is a wasteful number, since it uses less digits than its factorization.

43686454420240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546080680266 (or 546080680260 counting only the distinct ones).

The product of its (nonzero) digits is 17694720, while the sum is 52.

Adding to 43686454420240 its reverse (4202445468634), we get a palindrome (47888899888874).

The spelling of 43686454420240 in words is "forty-three trillion, six hundred eighty-six billion, four hundred fifty-four million, four hundred twenty thousand, two hundred forty".