9181819111090 has 16 divisors (see below), whose sum is σ = 16527335081688. Its totient is φ = 3672714159616.

The previous prime is 9181819111081. The next prime is 9181819111109. The reversal of 9181819111090 is 901119181819.

It can be written as a sum of positive squares in 4 ways, for example, as 7692152481729 + 1489666629361 = 2773473^2 + 1220519^2 .

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, 1452354 + ... + 4524706.

Almost surely, 2^{9181819111090} is an apocalyptic number.

9181819111090 is a deficient number, since it is larger than the sum of its proper divisors (7345515970598).

9181819111090 is a wasteful number, since it uses less digits than its factorization.

9181819111090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3371213.

The product of its (nonzero) digits is 46656, while the sum is 49.

The spelling of 9181819111090 in words is "nine trillion, one hundred eighty-one billion, eight hundred nineteen million, one hundred eleven thousand, ninety".