43173000645 has 16 divisors (see below), whose sum is σ = 69087427200. Its totient is φ = 23022058304.

The previous prime is 43173000643. The next prime is 43173000679. The reversal of 43173000645 is 54600037134.

It is a cyclic number.

It is not a de Polignac number, because 43173000645 - 2¹ = 43173000643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43173000643) 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 15 ways as a sum of consecutive naturals, for example, 119094 + ... + 317063.

It is an arithmetic number, because the mean of its divisors is an integer number (4317964200).

Almost surely, 2^43173000645 is an apocalyptic number.

It is an amenable number.

43173000645 is a deficient number, since it is larger than the sum of its proper divisors (25914426555).

43173000645 is a wasteful number, since it uses less digits than its factorization.

43173000645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442764.

The product of its (nonzero) digits is 30240, while the sum is 33.

Adding to 43173000645 its reverse (54600037134), we get a palindrome (97773037779).

The spelling of 43173000645 in words is "forty-three billion, one hundred seventy-three million, six hundred forty-five", and thus it is an aban number.