1611131112 has 24 divisors (see below), whose sum is σ = 4363480290. Its totient is φ = 537043680.

The previous prime is 1611131059. The next prime is 1611131129. The reversal of 1611131112 is 2111311161.

It can be written as a sum of positive squares in only one way, i.e., 954439236 + 656691876 = 30894^2 + 25626^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 11188339 + ... + 11188482.

Almost surely, 2^1611131112 is an apocalyptic number.

1611131112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1611131112 is an abundant number, since it is smaller than the sum of its proper divisors (2752349178).

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

1611131112 is a wasteful number, since it uses less digits than its factorization.

1611131112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22376833 (or 22376826 counting only the distinct ones).

The product of its digits is 36, while the sum is 18.

The square root of 1611131112 is about 40138.8977427134. The cubic root of 1611131112 is about 1172.3131271259.

Adding to 1611131112 its reverse (2111311161), we get a palindrome (3722442273).

The spelling of 1611131112 in words is "one billion, six hundred eleven million, one hundred thirty-one thousand, one hundred twelve".