1166116115556 has 72 divisors (see below), whose sum is σ = 3370254567680. Its totient is φ = 333030185856.

The previous prime is 1166116115537. The next prime is 1166116115603. The reversal of 1166116115556 is 6555116116611.

1166116115556 is a `hidden beast` number, since 1 + 16 + 6 + 11 + 61 + 15 + 556 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 435361 + ... + 1588008.

Almost surely, 2^{1166116115556} is an apocalyptic number.

It is an amenable number.

1166116115556 is an abundant number, since it is smaller than the sum of its proper divisors (2204138452124).

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

1166116115556 is a wasteful number, since it uses less digits than its factorization.

1166116115556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2025673 (or 2025668 counting only the distinct ones).

The product of its digits is 162000, while the sum is 45.

The spelling of 1166116115556 in words is "one trillion, one hundred sixty-six billion, one hundred sixteen million, one hundred fifteen thousand, five hundred fifty-six".