42644894143281 has 8 divisors (see below), whose sum is σ = 56860003040544. Its totient is φ = 28429857337440.

The previous prime is 42644894143277. The next prime is 42644894143297. The reversal of 42644894143281 is 18234149844624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42644894143281 - 2² = 42644894143277 is a prime.

It is a super-2 number, since 2×42644894143281² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42644894143211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16627156 + ... + 19019781.

It is an arithmetic number, because the mean of its divisors is an integer number (7107500380068).

Almost surely, 2^{42644894143281} is an apocalyptic number.

It is an amenable number.

42644894143281 is a deficient number, since it is larger than the sum of its proper divisors (14215108897263).

42644894143281 is a wasteful number, since it uses less digits than its factorization.

42644894143281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36045711.

The product of its digits is 42467328, while the sum is 60.

The spelling of 42644894143281 in words is "forty-two trillion, six hundred forty-four billion, eight hundred ninety-four million, one hundred forty-three thousand, two hundred eighty-one".