8181486290 has 16 divisors (see below), whose sum is σ = 14731255512. Its totient is φ = 3271576704.

The previous prime is 8181486259. The next prime is 8181486301. The reversal of 8181486290 is 926841818.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8100180001 + 81306289 = 90001^2 + 9017^2 .

It is a Curzon number.

It is an unprimeable number.

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, 93029 + ... + 158168.

Almost surely, 2^8181486290 is an apocalyptic number.

8181486290 is a deficient number, since it is larger than the sum of its proper divisors (6549769222).

8181486290 is a wasteful number, since it uses less digits than its factorization.

8181486290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254461.

The product of its (nonzero) digits is 221184, while the sum is 47.

The square root of 8181486290 is about 90451.5687536706. The cubic root of 8181486290 is about 2015.0109118978.

The spelling of 8181486290 in words is "eight billion, one hundred eighty-one million, four hundred eighty-six thousand, two hundred ninety".