42444644624 has 20 divisors (see below), whose sum is σ = 83363028636. Its totient is φ = 20931604992.

The previous prime is 42444644621. The next prime is 42444644629. The reversal of 42444644624 is 42644644424.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 36963907600 + 5480737024 = 192260^2 + 74032^2 .

It is not an unprimeable number, because it can be changed into a prime (42444644621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18168629 + ... + 18170964.

Almost surely, 2^42444644624 is an apocalyptic number.

It is an amenable number.

42444644624 is a deficient number, since it is larger than the sum of its proper divisors (40918384012).

42444644624 is a wasteful number, since it uses less digits than its factorization.

42444644624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36339674 (or 36339668 counting only the distinct ones).

The product of its digits is 2359296, while the sum is 44.

The spelling of 42444644624 in words is "forty-two billion, four hundred forty-four million, six hundred forty-four thousand, six hundred twenty-four".