43545320641325 has 6 divisors (see below), whose sum is σ = 53996197595274. Its totient is φ = 34836256513040.

The previous prime is 43545320641321. The next prime is 43545320641327. The reversal of 43545320641325 is 52314602354534.

It can be written as a sum of positive squares in 3 ways, for example, as 8587865416036 + 34957455225289 = 2930506^2 + 5912483^2 .

It is not a de Polignac number, because 43545320641325 - 2² = 43545320641321 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 43545320641325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43545320641321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 870906412802 + ... + 870906412851.

It is an arithmetic number, because the mean of its divisors is an integer number (8999366265879).

Almost surely, 2^{43545320641325} is an apocalyptic number.

It is an amenable number.

43545320641325 is a deficient number, since it is larger than the sum of its proper divisors (10450876953949).

43545320641325 is a wasteful number, since it uses less digits than its factorization.

43545320641325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741812825663 (or 1741812825658 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 47.

Adding to 43545320641325 its reverse (52314602354534), we get a palindrome (95859922995859).

The spelling of 43545320641325 in words is "forty-three trillion, five hundred forty-five billion, three hundred twenty million, six hundred forty-one thousand, three hundred twenty-five".