42723442636 has 48 divisors (see below), whose sum is σ = 90195033600. Its totient is φ = 17297964288.

The previous prime is 42723442633. The next prime is 42723442637. The reversal of 42723442636 is 63624432724.

It is a junction number, because it is equal to n+sod(n) for n = 42723442592 and 42723442601.

It is not an unprimeable number, because it can be changed into a prime (42723442633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79140 + ... + 302836.

It is an arithmetic number, because the mean of its divisors is an integer number (1879063200).

Almost surely, 2^42723442636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42723442636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45097516800).

42723442636 is an abundant number, since it is smaller than the sum of its proper divisors (47471590964).

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

42723442636 is a wasteful number, since it uses less digits than its factorization.

42723442636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224086 (or 224084 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 43.

The spelling of 42723442636 in words is "forty-two billion, seven hundred twenty-three million, four hundred forty-two thousand, six hundred thirty-six".