1129779809280 has 1760 divisors, whose sum is σ = 4537689247872. Its totient is φ = 267544166400.

The previous prime is 1129779809267. The next prime is 1129779809281. The reversal of 1129779809280 is 829089779211.

It is not an unprimeable number, because it can be changed into a prime (1129779809281) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 15912391645 + ... + 15912391715.

Almost surely, 2^{1129779809280} is an apocalyptic number.

1129779809280 is a gapful number since it is divisible by the number (10) 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 1129779809280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2268844623936).

1129779809280 is an abundant number, since it is smaller than the sum of its proper divisors (3407909438592).

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

1129779809280 is a wasteful number, since it uses less digits than its factorization.

1129779809280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 63.

The spelling of 1129779809280 in words is "one trillion, one hundred twenty-nine billion, seven hundred seventy-nine million, eight hundred nine thousand, two hundred eighty".