1143565164 has 72 divisors (see below), whose sum is σ = 3318352128. Its totient is φ = 325277280.

The previous prime is 1143565151. The next prime is 1143565237. The reversal of 1143565164 is 4615653411.

1143565164 is a `hidden beast` number, since 1 + 1 + 435 + 65 + 164 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47209 + ... + 67199.

It is an arithmetic number, because the mean of its divisors is an integer number (46088224).

Almost surely, 2^1143565164 is an apocalyptic number.

1143565164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143565164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1659176064).

1143565164 is an abundant number, since it is smaller than the sum of its proper divisors (2174786964).

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

1143565164 is a wasteful number, since it uses less digits than its factorization.

1143565164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20235 (or 20230 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 1143565164 is about 33816.6403417016. The cubic root of 1143565164 is about 1045.7317780632.

The spelling of 1143565164 in words is "one billion, one hundred forty-three million, five hundred sixty-five thousand, one hundred sixty-four".