1090990809018 has 48 divisors (see below), whose sum is σ = 2579016866400. Its totient is φ = 330563363040.

The previous prime is 1090990809017. The next prime is 1090990809047. The reversal of 1090990809018 is 8109080990901.

It is not an unprimeable number, because it can be changed into a prime (1090990809017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1332613 + ... + 1989431.

It is an arithmetic number, because the mean of its divisors is an integer number (53729518050).

Almost surely, 2^{1090990809018} is an apocalyptic number.

1090990809018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1090990809018 is an abundant number, since it is smaller than the sum of its proper divisors (1488026057382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1090990809018 is a wasteful number, since it uses less digits than its factorization.

1090990809018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665227 (or 665224 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 54.

The spelling of 1090990809018 in words is "one trillion, ninety billion, nine hundred ninety million, eight hundred nine thousand, eighteen".