9981822490 has 8 divisors (see below), whose sum is σ = 17967280500. Its totient is φ = 3992728992.

The previous prime is 9981822481. The next prime is 9981822491. The reversal of 9981822490 is 942281899.

It can be written as a sum of positive squares in 2 ways, for example, as 9464760369 + 517062121 = 97287^2 + 22739^2 .

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

It is not an unprimeable number, because it can be changed into a prime (9981822491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499091115 + ... + 499091134.

Almost surely, 2^9981822490 is an apocalyptic number.

9981822490 is a deficient number, since it is larger than the sum of its proper divisors (7985458010).

9981822490 is a wasteful number, since it uses less digits than its factorization.

9981822490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998182256.

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 9981822490 is about 99909.0711096845. The cubic root of 9981822490 is about 2153.1284896588.

The spelling of 9981822490 in words is "nine billion, nine hundred eighty-one million, eight hundred twenty-two thousand, four hundred ninety".