43559924957 has 2 divisors, whose sum is σ = 43559924958. Its totient is φ = 43559924956.

The previous prime is 43559924923. The next prime is 43559924983. The reversal of 43559924957 is 75942995534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35259075076 + 8300849881 = 187774^2 + 91109^2 .

It is a cyclic number.

It is not a de Polignac number, because 43559924957 - 2²⁰ = 43558876381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43559924957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43559926957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21779962478 + 21779962479.

It is an arithmetic number, because the mean of its divisors is an integer number (21779962479).

Almost surely, 2^43559924957 is an apocalyptic number.

It is an amenable number.

43559924957 is a deficient number, since it is larger than the sum of its proper divisors (1).

43559924957 is an equidigital number, since it uses as much as digits as its factorization.

43559924957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61236000, while the sum is 62.

The spelling of 43559924957 in words is "forty-three billion, five hundred fifty-nine million, nine hundred twenty-four thousand, nine hundred fifty-seven".