43545642361 has 16 divisors (see below), whose sum is σ = 48252061648. Its totient is φ = 39037075200.

The previous prime is 43545642359. The next prime is 43545642367. The reversal of 43545642361 is 16324654534.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 994203961 + 42551438400 = 31531^2 + 206280^2 .

It is a cyclic number.

It is not a de Polignac number, because 43545642361 - 2¹ = 43545642359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43545642367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176551 + ... + 343891.

It is an arithmetic number, because the mean of its divisors is an integer number (3015753853).

Almost surely, 2^43545642361 is an apocalyptic number.

It is an amenable number.

43545642361 is a deficient number, since it is larger than the sum of its proper divisors (4706419287).

43545642361 is a wasteful number, since it uses less digits than its factorization.

43545642361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167932.

The product of its digits is 1036800, while the sum is 43.

The spelling of 43545642361 in words is "forty-three billion, five hundred forty-five million, six hundred forty-two thousand, three hundred sixty-one".