442164854681 has 16 divisors (see below), whose sum is σ = 489674566080. Its totient is φ = 395876743680.

The previous prime is 442164854647. The next prime is 442164854711. The reversal of 442164854681 is 186458461244.

It is not a de Polignac number, because 442164854681 - 2²² = 442160660377 is a prime.

It is a super-2 number, since 2×442164854681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (442164854641) 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, 3217505 + ... + 3352113.

It is an arithmetic number, because the mean of its divisors is an integer number (30604660380).

Almost surely, 2^442164854681 is an apocalyptic number.

It is an amenable number.

442164854681 is a deficient number, since it is larger than the sum of its proper divisors (47509711399).

442164854681 is a wasteful number, since it uses less digits than its factorization.

442164854681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139144.

The product of its digits is 5898240, while the sum is 53.

The spelling of 442164854681 in words is "four hundred forty-two billion, one hundred sixty-four million, eight hundred fifty-four thousand, six hundred eighty-one".