11091117890890 has 16 divisors (see below), whose sum is σ = 19964870588520. Its totient is φ = 4436256404160.

The previous prime is 11091117890833. The next prime is 11091117890903. The reversal of 11091117890890 is 9809871119011.

It is a Cunningham number, because it is equal to 3330333²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 4498399209249 + 6592718681641 = 2120943^2 + 2567629^2 .

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, 23599701 + ... + 24065080.

Almost surely, 2^{11091117890890} is an apocalyptic number.

11091117890890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11091117890890 is a deficient number, since it is larger than the sum of its proper divisors (8873752697630).

11091117890890 is a wasteful number, since it uses less digits than its factorization.

11091117890890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47688057.

The product of its (nonzero) digits is 326592, while the sum is 55.

The spelling of 11091117890890 in words is "eleven trillion, ninety-one billion, one hundred seventeen million, eight hundred ninety thousand, eight hundred ninety".