1143265536 has 144 divisors (see below), whose sum is σ = 3863977600. Its totient is φ = 326633472.

The previous prime is 1143265507. The next prime is 1143265559. The reversal of 1143265536 is 6355623411.

1143265536 is a `hidden beast` number, since 114 + 3 + 2 + 6 + 5 + 536 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1143265536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36570 + ... + 60198.

Almost surely, 2^1143265536 is an apocalyptic number.

1143265536 is a gapful number since it is divisible by the number (16) 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 1143265536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1931988800).

1143265536 is an abundant number, since it is smaller than the sum of its proper divisors (2720712064).

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

1143265536 is an equidigital number, since it uses as much as digits as its factorization.

1143265536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23661 (or 23641 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 1143265536 is about 33812.2098656683. The cubic root of 1143265536 is about 1045.6404385982.

Adding to 1143265536 its reverse (6355623411), we get a palindrome (7498888947).

The spelling of 1143265536 in words is "one billion, one hundred forty-three million, two hundred sixty-five thousand, five hundred thirty-six".