43606436849 has 4 divisors (see below), whose sum is σ = 43607653236. Its totient is φ = 43605220464.

The previous prime is 43606436833. The next prime is 43606436893. The reversal of 43606436849 is 94863460634.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94863460634 = 2 ⋅47431730317.

It can be written as a sum of positive squares in 2 ways, for example, as 2870280625 + 40736156224 = 53575^2 + 201832^2 .

It is a cyclic number.

It is not a de Polignac number, because 43606436849 - 2⁴ = 43606436833 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 43606436849.

It is not an unprimeable number, because it can be changed into a prime (43606436249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552734 + ... + 626679.

It is an arithmetic number, because the mean of its divisors is an integer number (10901913309).

Almost surely, 2^43606436849 is an apocalyptic number.

It is an amenable number.

43606436849 is a deficient number, since it is larger than the sum of its proper divisors (1216387).

43606436849 is a wasteful number, since it uses less digits than its factorization.

43606436849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216386.

The product of its (nonzero) digits is 8957952, while the sum is 53.

The spelling of 43606436849 in words is "forty-three billion, six hundred six million, four hundred thirty-six thousand, eight hundred forty-nine".