42443855173 has 2 divisors, whose sum is σ = 42443855174. Its totient is φ = 42443855172.

The previous prime is 42443855093. The next prime is 42443855183. The reversal of 42443855173 is 37155834424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35964088164 + 6479767009 = 189642^2 + 80497^2 .

It is a cyclic number.

It is not a de Polignac number, because 42443855173 - 2¹³ = 42443846981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42443855183) 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 as a sum of consecutive naturals, namely, 21221927586 + 21221927587.

It is an arithmetic number, because the mean of its divisors is an integer number (21221927587).

Almost surely, 2^42443855173 is an apocalyptic number.

It is an amenable number.

42443855173 is a deficient number, since it is larger than the sum of its proper divisors (1).

42443855173 is an equidigital number, since it uses as much as digits as its factorization.

42443855173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1612800, while the sum is 46.

The spelling of 42443855173 in words is "forty-two billion, four hundred forty-three million, eight hundred fifty-five thousand, one hundred seventy-three".