42442175647 has 2 divisors, whose sum is σ = 42442175648. Its totient is φ = 42442175646.

The previous prime is 42442175641. The next prime is 42442175669. The reversal of 42442175647 is 74657124424.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42442175647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42442175597 and 42442175606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42442175641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21221087823 + 21221087824.

It is an arithmetic number, because the mean of its divisors is an integer number (21221087824).

Almost surely, 2^42442175647 is an apocalyptic number.

42442175647 is a deficient number, since it is larger than the sum of its proper divisors (1).

42442175647 is an equidigital number, since it uses as much as digits as its factorization.

42442175647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1505280, while the sum is 46.

It can be divided in two parts, 42442 and 175647, that added together give a square (218089 = 467²).

The spelling of 42442175647 in words is "forty-two billion, four hundred forty-two million, one hundred seventy-five thousand, six hundred forty-seven".