1161048505266 has 192 divisors, whose sum is σ = 3039773274720. Its totient is φ = 316717793280.

The previous prime is 1161048505231. The next prime is 1161048505271. The reversal of 1161048505266 is 6625058401611.

1161048505266 is a `hidden beast` number, since 1 + 1 + 61 + 0 + 485 + 0 + 52 + 66 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 41441152041 + 1119607353225 = 203571^2 + 1058115^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4607106 + ... + 4852578.

Almost surely, 2^{1161048505266} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161048505266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1519886637360).

1161048505266 is an abundant number, since it is smaller than the sum of its proper divisors (1878724769454).

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

1161048505266 is a wasteful number, since it uses less digits than its factorization.

1161048505266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245581 (or 245578 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 1161048505266 in words is "one trillion, one hundred sixty-one billion, forty-eight million, five hundred five thousand, two hundred sixty-six".