42444440440429 has 2 divisors, whose sum is σ = 42444440440430. Its totient is φ = 42444440440428.

The previous prime is 42444440440399. The next prime is 42444440440517. The reversal of 42444440440429 is 92404404444424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31307549949225 + 11136890491204 = 5595315^2 + 3337198^2 .

It is a cyclic number.

It is not a de Polignac number, because 42444440440429 - 2¹³ = 42444440432237 is a prime.

It is a super-2 number, since 2×42444440440429² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42444440440729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21222220220214 + 21222220220215.

It is an arithmetic number, because the mean of its divisors is an integer number (21222220220215).

Almost surely, 2^{42444440440429} is an apocalyptic number.

It is an amenable number.

42444440440429 is a deficient number, since it is larger than the sum of its proper divisors (1).

42444440440429 is an equidigital number, since it uses as much as digits as its factorization.

42444440440429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9437184, while the sum is 49.

The spelling of 42444440440429 in words is "forty-two trillion, four hundred forty-four billion, four hundred forty million, four hundred forty thousand, four hundred twenty-nine".