1163113661566 has 16 divisors (see below), whose sum is σ = 1778357825280. Its totient is φ = 570373460440.

The previous prime is 1163113661551. The next prime is 1163113661587. The reversal of 1163113661566 is 6651663113611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11384056 + ... + 11485771.

It is an arithmetic number, because the mean of its divisors is an integer number (111147364080).

Almost surely, 2^{1163113661566} is an apocalyptic number.

1163113661566 is a deficient number, since it is larger than the sum of its proper divisors (615244163714).

1163113661566 is a wasteful number, since it uses less digits than its factorization.

1163113661566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22870319.

The product of its digits is 349920, while the sum is 46.

The spelling of 1163113661566 in words is "one trillion, one hundred sixty-three billion, one hundred thirteen million, six hundred sixty-one thousand, five hundred sixty-six".