42443031636 has 72 divisors (see below), whose sum is σ = 108421668264. Its totient is φ = 13998182400.

The previous prime is 42443031607. The next prime is 42443031637. The reversal of 42443031636 is 63613034424.

It can be written as a sum of positive squares in 4 ways, for example, as 33053421636 + 9389610000 = 181806^2 + 96900^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 42443031636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42443031637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7243620 + ... + 7249476.

Almost surely, 2^42443031636 is an apocalyptic number.

It is an amenable number.

42443031636 is an abundant number, since it is smaller than the sum of its proper divisors (65978636628).

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

42443031636 is a wasteful number, since it uses less digits than its factorization.

42443031636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7961 (or 7956 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 36.

The spelling of 42443031636 in words is "forty-two billion, four hundred forty-three million, thirty-one thousand, six hundred thirty-six".