1143635166 has 64 divisors (see below), whose sum is σ = 2598350400. Its totient is φ = 372722688.

The previous prime is 1143635147. The next prime is 1143635189. The reversal of 1143635166 is 6615363411.

1143635166 is a `hidden beast` number, since 1 + 1 + 4 + 3 + 635 + 16 + 6 = 666.

1143635166 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1143635166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1170070 + ... + 1171046.

It is an arithmetic number, because the mean of its divisors is an integer number (40599225).

Almost surely, 2^1143635166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143635166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1299175200).

1143635166 is an abundant number, since it is smaller than the sum of its proper divisors (1454715234).

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

1143635166 is a wasteful number, since it uses less digits than its factorization.

1143635166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450 (or 1444 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 1143635166 is about 33817.6753488468. The cubic root of 1143635166 is about 1045.7531153758.

Adding to 1143635166 its reverse (6615363411), we get a palindrome (7758998577).

The spelling of 1143635166 in words is "one billion, one hundred forty-three million, six hundred thirty-five thousand, one hundred sixty-six".