1161543264 has 192 divisors, whose sum is σ = 3795724800. Its totient is φ = 303464448.

The previous prime is 1161543259. The next prime is 1161543277. The reversal of 1161543264 is 4623451611.

1161543264 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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, 368704 + ... + 371840.

It is an arithmetic number, because the mean of its divisors is an integer number (19769400).

Almost surely, 2^1161543264 is an apocalyptic number.

1161543264 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 1161543264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1897862400).

1161543264 is an abundant number, since it is smaller than the sum of its proper divisors (2634181536).

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

1161543264 is a wasteful number, since it uses less digits than its factorization.

1161543264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205 (or 3197 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 1161543264 is about 34081.4210971315. The cubic root of 1161543264 is about 1051.1833262346.

Adding to 1161543264 its reverse (4623451611), we get a palindrome (5784994875).

The spelling of 1161543264 in words is "one billion, one hundred sixty-one million, five hundred forty-three thousand, two hundred sixty-four".