1099131780992 has 128 divisors (see below), whose sum is σ = 2612807193600. Its totient is φ = 450314219520.

The previous prime is 1099131780991. The next prime is 1099131781021. The reversal of 1099131780992 is 2990871319901.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099131780991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37718684 + ... + 37747812.

It is an arithmetic number, because the mean of its divisors is an integer number (20412556200).

Almost surely, 2^{1099131780992} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1099131780992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1306403596800).

1099131780992 is an abundant number, since it is smaller than the sum of its proper divisors (1513675412608).

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

1099131780992 is a wasteful number, since it uses less digits than its factorization.

1099131780992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31004 (or 30992 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 59.

The spelling of 1099131780992 in words is "one trillion, ninety-nine billion, one hundred thirty-one million, seven hundred eighty thousand, nine hundred ninety-two".