1161311532 has 24 divisors (see below), whose sum is σ = 2767382016. Its totient is φ = 378867408.

The previous prime is 1161311527. The next prime is 1161311533. The reversal of 1161311532 is 2351131611.

It is not an unprimeable number, because it can be changed into a prime (1161311533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1028968 + ... + 1030095.

It is an arithmetic number, because the mean of its divisors is an integer number (115307584).

Almost surely, 2^1161311532 is an apocalyptic number.

1161311532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1161311532 is an abundant number, since it is smaller than the sum of its proper divisors (1606070484).

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

1161311532 is a wasteful number, since it uses less digits than its factorization.

1161311532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059117 (or 2059115 counting only the distinct ones).

The product of its digits is 540, while the sum is 24.

The square root of 1161311532 is about 34078.0212453716. The cubic root of 1161311532 is about 1051.1134166516.

The spelling of 1161311532 in words is "one billion, one hundred sixty-one million, three hundred eleven thousand, five hundred thirty-two".