4421981143887 has 8 divisors (see below), whose sum is σ = 5935021050240. Its totient is φ = 2928464333400.

The previous prime is 4421981143763. The next prime is 4421981143889. The reversal of 4421981143887 is 7883411891244.

It is a happy number.

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

It is not a de Polignac number, because 4421981143887 - 2¹⁰ = 4421981142863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4421981143887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4421981143889) 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, 4880773437 + ... + 4880774342.

It is an arithmetic number, because the mean of its divisors is an integer number (741877631280).

Almost surely, 2^{4421981143887} is an apocalyptic number.

4421981143887 is a deficient number, since it is larger than the sum of its proper divisors (1513039906353).

4421981143887 is a wasteful number, since it uses less digits than its factorization.

4421981143887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9761547933.

The product of its digits is 12386304, while the sum is 60.

The spelling of 4421981143887 in words is "four trillion, four hundred twenty-one billion, nine hundred eighty-one million, one hundred forty-three thousand, eight hundred eighty-seven".