42144432469 has 2 divisors, whose sum is σ = 42144432470. Its totient is φ = 42144432468.

The previous prime is 42144432371. The next prime is 42144432487. The reversal of 42144432469 is 96423444124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40426329969 + 1718102500 = 201063^2 + 41450^2 .

It is a cyclic number.

It is not a de Polignac number, because 42144432469 - 2¹¹ = 42144430421 is a prime.

It is a super-2 number, since 2×42144432469² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42144435469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21072216234 + 21072216235.

It is an arithmetic number, because the mean of its divisors is an integer number (21072216235).

Almost surely, 2^42144432469 is an apocalyptic number.

It is an amenable number.

42144432469 is a deficient number, since it is larger than the sum of its proper divisors (1).

42144432469 is an equidigital number, since it uses as much as digits as its factorization.

42144432469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 43.

The spelling of 42144432469 in words is "forty-two billion, one hundred forty-four million, four hundred thirty-two thousand, four hundred sixty-nine".