42044044203989 has 2 divisors, whose sum is σ = 42044044203990. Its totient is φ = 42044044203988.

The previous prime is 42044044203983. The next prime is 42044044204033. The reversal of 42044044203989 is 98930244044024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35528573542225 + 6515470661764 = 5960585^2 + 2552542^2 .

It is a cyclic number.

It is not a de Polignac number, because 42044044203989 - 2³⁶ = 41975324727253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42044044203989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42044044203983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21022022101994 + 21022022101995.

It is an arithmetic number, because the mean of its divisors is an integer number (21022022101995).

Almost surely, 2^{42044044203989} is an apocalyptic number.

It is an amenable number.

42044044203989 is a deficient number, since it is larger than the sum of its proper divisors (1).

42044044203989 is an equidigital number, since it uses as much as digits as its factorization.

42044044203989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7962624, while the sum is 53.

The spelling of 42044044203989 in words is "forty-two trillion, forty-four billion, forty-four million, two hundred three thousand, nine hundred eighty-nine".