1611332772 has 96 divisors (see below), whose sum is σ = 4619489280. Its totient is φ = 426850560.

The previous prime is 1611332741. The next prime is 1611332773. The reversal of 1611332772 is 2772331161.

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

It is not an unprimeable number, because it can be changed into a prime (1611332773) 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 31 ways as a sum of consecutive naturals, for example, 64272 + ... + 85752.

It is an arithmetic number, because the mean of its divisors is an integer number (48119680).

Almost surely, 2^1611332772 is an apocalyptic number.

1611332772 is a gapful number since it is divisible by the number (12) 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 1611332772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2309744640).

1611332772 is an abundant number, since it is smaller than the sum of its proper divisors (3008156508).

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

1611332772 is a wasteful number, since it uses less digits than its factorization.

1611332772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21561 (or 21559 counting only the distinct ones).

The product of its digits is 10584, while the sum is 33.

The square root of 1611332772 is about 40141.4096912403. The cubic root of 1611332772 is about 1172.3620366158.

The spelling of 1611332772 in words is "one billion, six hundred eleven million, three hundred thirty-two thousand, seven hundred seventy-two".