43644030473 has 2 divisors, whose sum is σ = 43644030474. Its totient is φ = 43644030472.

The previous prime is 43644030403. The next prime is 43644030499. The reversal of 43644030473 is 37403044634.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41539331344 + 2104699129 = 203812^2 + 45877^2 .

It is a cyclic number.

It is not a de Polignac number, because 43644030473 - 2⁸ = 43644030217 is a prime.

It is not a weakly prime, because it can be changed into another prime (43644030403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21822015236 + 21822015237.

It is an arithmetic number, because the mean of its divisors is an integer number (21822015237).

Almost surely, 2^43644030473 is an apocalyptic number.

It is an amenable number.

43644030473 is a deficient number, since it is larger than the sum of its proper divisors (1).

43644030473 is an equidigital number, since it uses as much as digits as its factorization.

43644030473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 38.

The spelling of 43644030473 in words is "forty-three billion, six hundred forty-four million, thirty thousand, four hundred seventy-three".