42144565618 has 16 divisors (see below), whose sum is σ = 64947705624. Its totient is φ = 20495721600.

The previous prime is 42144565613. The next prime is 42144565643. The reversal of 42144565618 is 81656544124.

It can be written as a sum of positive squares in 4 ways, for example, as 30588960609 + 11555605009 = 174897^2 + 107497^2 .

It is a super-2 number, since 2×42144565618² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42144565613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122518 + ... + 315118.

Almost surely, 2^42144565618 is an apocalyptic number.

42144565618 is a deficient number, since it is larger than the sum of its proper divisors (22803140006).

42144565618 is a wasteful number, since it uses less digits than its factorization.

42144565618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195597.

The product of its digits is 921600, while the sum is 46.

The spelling of 42144565618 in words is "forty-two billion, one hundred forty-four million, five hundred sixty-five thousand, six hundred eighteen".