1161881688 has 96 divisors (see below), whose sum is σ = 3253446000. Its totient is φ = 345396480.

The previous prime is 1161881683. The next prime is 1161881719. The reversal of 1161881688 is 8861881611.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161881681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150138 + ... + 157686.

Almost surely, 2^1161881688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161881688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1626723000).

1161881688 is an abundant number, since it is smaller than the sum of its proper divisors (2091564312).

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

1161881688 is a wasteful number, since it uses less digits than its factorization.

1161881688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7633 (or 7618 counting only the distinct ones).

The product of its digits is 147456, while the sum is 48.

The square root of 1161881688 is about 34086.3856693549. The cubic root of 1161881688 is about 1051.2854062670.

The spelling of 1161881688 in words is "one billion, one hundred sixty-one million, eight hundred eighty-one thousand, six hundred eighty-eight".