43045745665 has 16 divisors (see below), whose sum is σ = 55700377488. Its totient is φ = 31746468096.

The previous prime is 43045745641. The next prime is 43045745669. The reversal of 43045745665 is 56654754034.

It can be written as a sum of positive squares in 8 ways, for example, as 23375963664 + 19669782001 = 152892^2 + 140249^2 .

It is a cyclic number.

It is not a de Polignac number, because 43045745665 - 2¹¹ = 43045743617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43045745669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 378114 + ... + 478603.

It is an arithmetic number, because the mean of its divisors is an integer number (3481273593).

Almost surely, 2^43045745665 is an apocalyptic number.

It is an amenable number.

43045745665 is a deficient number, since it is larger than the sum of its proper divisors (12654631823).

43045745665 is a wasteful number, since it uses less digits than its factorization.

43045745665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857508.

The product of its (nonzero) digits is 6048000, while the sum is 49.

The spelling of 43045745665 in words is "forty-three billion, forty-five million, seven hundred forty-five thousand, six hundred sixty-five".