43581136838357 has 4 divisors (see below), whose sum is σ = 44070812533260. Its totient is φ = 43091461143456.

The previous prime is 43581136838297. The next prime is 43581136838399. The reversal of 43581136838357 is 75383863118534.

43581136838357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30342316324996 + 13238820513361 = 5508386^2 + 3638519^2 .

It is a cyclic number.

It is not a de Polignac number, because 43581136838357 - 2⁶ = 43581136838293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43581136838293 and 43581136838302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43581136838857) 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, 244837847318 + ... + 244837847495.

It is an arithmetic number, because the mean of its divisors is an integer number (11017703133315).

Almost surely, 2^{43581136838357} is an apocalyptic number.

It is an amenable number.

43581136838357 is a deficient number, since it is larger than the sum of its proper divisors (489675694903).

43581136838357 is an equidigital number, since it uses as much as digits as its factorization.

43581136838357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489675694902.

The product of its digits is 174182400, while the sum is 65.

The spelling of 43581136838357 in words is "forty-three trillion, five hundred eighty-one billion, one hundred thirty-six million, eight hundred thirty-eight thousand, three hundred fifty-seven".