43581834493 has 8 divisors (see below), whose sum is σ = 44648759736. Its totient is φ = 42515097600.

The previous prime is 43581834467. The next prime is 43581834509. The reversal of 43581834493 is 39443818534.

It is a happy number.

43581834493 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 4 ways, for example, as 6457408164 + 37124426329 = 80358^2 + 192677^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-43581834493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43581834493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43581831493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497455 + ... + 578467.

It is an arithmetic number, because the mean of its divisors is an integer number (5581094967).

Almost surely, 2^43581834493 is an apocalyptic number.

It is an amenable number.

43581834493 is a deficient number, since it is larger than the sum of its proper divisors (1066925243).

43581834493 is a wasteful number, since it uses less digits than its factorization.

43581834493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94175.

The product of its digits is 4976640, while the sum is 52.

The spelling of 43581834493 in words is "forty-three billion, five hundred eighty-one million, eight hundred thirty-four thousand, four hundred ninety-three".