42145243644 has 48 divisors (see below), whose sum is σ = 112443161600. Its totient is φ = 12035514816.

The previous prime is 42145243639. The next prime is 42145243709. The reversal of 42145243644 is 44634254124.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 46797 + ... + 294075.

Almost surely, 2^42145243644 is an apocalyptic number.

It is an amenable number.

42145243644 is an abundant number, since it is smaller than the sum of its proper divisors (70297917956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42145243644 is a wasteful number, since it uses less digits than its factorization.

42145243644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249322 (or 249320 counting only the distinct ones).

The product of its digits is 368640, while the sum is 39.

Adding to 42145243644 its reverse (44634254124), we get a palindrome (86779497768).

The spelling of 42145243644 in words is "forty-two billion, one hundred forty-five million, two hundred forty-three thousand, six hundred forty-four".