1161543263 has 8 divisors (see below), whose sum is σ = 1212448608. Its totient is φ = 1110671584.

The previous prime is 1161543259. The next prime is 1161543277. The reversal of 1161543263 is 3623451611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1161543263 - 2² = 1161543259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161543763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83645 + ... + 96537.

It is an arithmetic number, because the mean of its divisors is an integer number (151556076).

Almost surely, 2^1161543263 is an apocalyptic number.

1161543263 is a deficient number, since it is larger than the sum of its proper divisors (50905345).

1161543263 is a wasteful number, since it uses less digits than its factorization.

1161543263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16833.

The product of its digits is 12960, while the sum is 32.

The square root of 1161543263 is about 34081.4210824607. The cubic root of 1161543263 is about 1051.1833259329.

Adding to 1161543263 its reverse (3623451611), we get a palindrome (4784994874).

The spelling of 1161543263 in words is "one billion, one hundred sixty-one million, five hundred forty-three thousand, two hundred sixty-three".