8444750981 has 8 divisors (see below), whose sum is σ = 8700359160. Its totient is φ = 8190583488.

The previous prime is 8444750971. The next prime is 8444750983. The reversal of 8444750981 is 1890574448.

It can be written as a sum of positive squares in 4 ways, for example, as 2816000356 + 5628750625 = 53066^2 + 75025^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 8444750981 - 2¹⁸ = 8444488837 is a prime.

It is a super-2 number, since 2×8444750981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8444750983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348266 + ... + 371723.

It is an arithmetic number, because the mean of its divisors is an integer number (1087544895).

Almost surely, 2^8444750981 is an apocalyptic number.

It is an amenable number.

8444750981 is a deficient number, since it is larger than the sum of its proper divisors (255608179).

8444750981 is a wasteful number, since it uses less digits than its factorization.

8444750981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720343.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The square root of 8444750981 is about 91895.3262195635. The cubic root of 8444750981 is about 2036.3962214869.

The spelling of 8444750981 in words is "eight billion, four hundred forty-four million, seven hundred fifty thousand, nine hundred eighty-one".