1163685564 has 144 divisors (see below), whose sum is σ = 3258178560. Its totient is φ = 348572160.

The previous prime is 1163685553. The next prime is 1163685569. The reversal of 1163685564 is 4655863611.

1163685564 is a `hidden beast` number, since 1 + 1 + 6 + 3 + 6 + 85 + 564 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163685569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1574307 + ... + 1575045.

It is an arithmetic number, because the mean of its divisors is an integer number (22626240).

Almost surely, 2^1163685564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1163685564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1629089280).

1163685564 is an abundant number, since it is smaller than the sum of its proper divisors (2094492996).

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

1163685564 is a wasteful number, since it uses less digits than its factorization.

1163685564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880 (or 875 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 1163685564 is about 34112.8357660280. The cubic root of 1163685564 is about 1051.8291816410.

The spelling of 1163685564 in words is "one billion, one hundred sixty-three million, six hundred eighty-five thousand, five hundred sixty-four".