42841443681 has 12 divisors (see below), whose sum is σ = 62147676708. Its totient is φ = 28438381824.

The previous prime is 42841443677. The next prime is 42841443683. The reversal of 42841443681 is 18634414824.

42841443681 is a `hidden beast` number, since 4 + 284 + 1 + 4 + 4 + 368 + 1 = 666.

42841443681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 18430506081 + 24410937600 = 135759^2 + 156240^2 .

It is not a de Polignac number, because 42841443681 - 2² = 42841443677 is a prime.

It is a super-2 number, since 2×42841443681² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42841443683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10212840 + ... + 10217033.

It is an arithmetic number, because the mean of its divisors is an integer number (5178973059).

Almost surely, 2^42841443681 is an apocalyptic number.

It is an amenable number.

42841443681 is a deficient number, since it is larger than the sum of its proper divisors (19306233027).

42841443681 is a wasteful number, since it uses less digits than its factorization.

42841443681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20430112 (or 20430109 counting only the distinct ones).

The product of its digits is 589824, while the sum is 45.

The spelling of 42841443681 in words is "forty-two billion, eight hundred forty-one million, four hundred forty-three thousand, six hundred eighty-one".