1166441573556 has 36 divisors (see below), whose sum is σ = 3369720102112. Its totient is φ = 333269020944.

The previous prime is 1166441573543. The next prime is 1166441573659. The reversal of 1166441573556 is 6553751446611.

1166441573556 is a `hidden beast` number, since 1 + 1 + 6 + 6 + 4 + 4 + 15 + 73 + 556 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2314367950 + ... + 2314368453.

Almost surely, 2^{1166441573556} is an apocalyptic number.

It is an amenable number.

1166441573556 is an abundant number, since it is smaller than the sum of its proper divisors (2203278528556).

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

1166441573556 is a wasteful number, since it uses less digits than its factorization.

1166441573556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628736420 (or 4628736415 counting only the distinct ones).

The product of its digits is 9072000, while the sum is 54.

The spelling of 1166441573556 in words is "one trillion, one hundred sixty-six billion, four hundred forty-one million, five hundred seventy-three thousand, five hundred fifty-six".