1163143556 has 12 divisors (see below), whose sum is σ = 2038337280. Its totient is φ = 580761480.

The previous prime is 1163143481. The next prime is 1163143561. The reversal of 1163143556 is 6553413611.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199340 + ... + 205091.

It is an arithmetic number, because the mean of its divisors is an integer number (169861440).

Almost surely, 2^1163143556 is an apocalyptic number.

It is an amenable number.

1163143556 is a deficient number, since it is larger than the sum of its proper divisors (875193724).

1163143556 is a wasteful number, since it uses less digits than its factorization.

1163143556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405154 (or 405152 counting only the distinct ones).

The product of its digits is 32400, while the sum is 35.

The square root of 1163143556 is about 34104.8904997509. The cubic root of 1163143556 is about 1051.6658533379.

The spelling of 1163143556 in words is "one billion, one hundred sixty-three million, one hundred forty-three thousand, five hundred fifty-six".