1109991851592 has 96 divisors (see below), whose sum is σ = 3154004441280. Its totient is φ = 323560344960.

The previous prime is 1109991851557. The next prime is 1109991851609. The reversal of 1109991851592 is 2951581999011.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4814884 + ... + 5040147.

It is an arithmetic number, because the mean of its divisors is an integer number (32854212930).

Almost surely, 2^{1109991851592} is an apocalyptic number.

1109991851592 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1109991851592 is an abundant number, since it is smaller than the sum of its proper divisors (2044012589688).

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

1109991851592 is a wasteful number, since it uses less digits than its factorization.

1109991851592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9855091 (or 9855068 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 60.

The spelling of 1109991851592 in words is "one trillion, one hundred nine billion, nine hundred ninety-one million, eight hundred fifty-one thousand, five hundred ninety-two".