1129991897088 has 418 divisors, whose sum is σ = 3436387761374. Its totient is φ = 371504185344.

The previous prime is 1129991897077. The next prime is 1129991897123. The reversal of 1129991897088 is 8807981999211.

1129991897088 is a `hidden beast` number, since 11 + 299 + 9 + 189 + 70 + 88 = 666.

It can be written as a sum of positive squares in only one way, i.e., 990677827584 + 139314069504 = 995328^2 + 373248^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 21 ways as a sum of consecutive naturals, for example, 15479341020 + ... + 15479341092.

Almost surely, 2^{1129991897088} is an apocalyptic number.

1129991897088 is a gapful number since it is divisible by the number (18) 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 1129991897088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1718193880687).

1129991897088 is an abundant number, since it is smaller than the sum of its proper divisors (2306395864286).

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

1129991897088 is an frugal number, since it uses more digits than its factorization.

1129991897088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 72.

The spelling of 1129991897088 in words is "one trillion, one hundred twenty-nine billion, nine hundred ninety-one million, eight hundred ninety-seven thousand, eighty-eight".