1131291809592 has 128 divisors (see below), whose sum is σ = 3281309222400. Its totient is φ = 318349836288.

The previous prime is 1131291809587. The next prime is 1131291809677. The reversal of 1131291809592 is 2959081921311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3695463 + ... + 3989865.

It is an arithmetic number, because the mean of its divisors is an integer number (25635228300).

Almost surely, 2^{1131291809592} is an apocalyptic number.

1131291809592 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1131291809592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1640654611200).

1131291809592 is an abundant number, since it is smaller than the sum of its proper divisors (2150017412808).

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

1131291809592 is a wasteful number, since it uses less digits than its factorization.

1131291809592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294765 (or 294761 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 51.

The spelling of 1131291809592 in words is "one trillion, one hundred thirty-one billion, two hundred ninety-one million, eight hundred nine thousand, five hundred ninety-two".