42656684812 has 18 divisors (see below), whose sum is σ = 86836823052. Its totient is φ = 18281436264.

The previous prime is 42656684809. The next prime is 42656684849. The reversal of 42656684812 is 21848665624.

It is a happy number.

42656684812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42656684812² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42656684812.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108817878 + ... + 108818269.

Almost surely, 2^42656684812 is an apocalyptic number.

It is an amenable number.

42656684812 is an abundant number, since it is smaller than the sum of its proper divisors (44180138240).

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

42656684812 is a wasteful number, since it uses less digits than its factorization.

42656684812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217636165 (or 217636156 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 52.

The spelling of 42656684812 in words is "forty-two billion, six hundred fifty-six million, six hundred eighty-four thousand, eight hundred twelve".