42111351644 has 24 divisors (see below), whose sum is σ = 78083743248. Its totient is φ = 19803421440.

The previous prime is 42111351641. The next prime is 42111351683. The reversal of 42111351644 is 44615311124.

It is a self number, because there is not a number n which added to its sum of digits gives 42111351644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42111351641) 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 in 7 ways as a sum of consecutive naturals, for example, 114302 + ... + 311909.

It is an arithmetic number, because the mean of its divisors is an integer number (3253489302).

Almost surely, 2^42111351644 is an apocalyptic number.

It is an amenable number.

42111351644 is a deficient number, since it is larger than the sum of its proper divisors (35972391604).

42111351644 is a wasteful number, since it uses less digits than its factorization.

42111351644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427685 (or 427683 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

Adding to 42111351644 its reverse (44615311124), we get a palindrome (86726662768).

The spelling of 42111351644 in words is "forty-two billion, one hundred eleven million, three hundred fifty-one thousand, six hundred forty-four".