43640307245 has 4 divisors (see below), whose sum is σ = 52368368700. Its totient is φ = 34912245792.

The previous prime is 43640307241. The next prime is 43640307247. The reversal of 43640307245 is 54270304634.

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 6973419049 + 36666888196 = 83507^2 + 191486^2 .

It is a cyclic number.

It is not a de Polignac number, because 43640307245 - 2² = 43640307241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43640307199 and 43640307208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43640307241) 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 3 ways as a sum of consecutive naturals, for example, 4364030720 + ... + 4364030729.

It is an arithmetic number, because the mean of its divisors is an integer number (13092092175).

Almost surely, 2^43640307245 is an apocalyptic number.

It is an amenable number.

43640307245 is a deficient number, since it is larger than the sum of its proper divisors (8728061455).

43640307245 is an equidigital number, since it uses as much as digits as its factorization.

43640307245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8728061454.

The product of its (nonzero) digits is 241920, while the sum is 38.

The spelling of 43640307245 in words is "forty-three billion, six hundred forty million, three hundred seven thousand, two hundred forty-five".