3611320636 has 96 divisors (see below), whose sum is σ = 8060774400. Its totient is φ = 1374943680.

The previous prime is 3611320627. The next prime is 3611320639. The reversal of 3611320636 is 6360231163.

It is a junction number, because it is equal to n+sod(n) for n = 3611320598 and 3611320607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3611320639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2867775 + ... + 2869033.

It is an arithmetic number, because the mean of its divisors is an integer number (83966400).

Almost surely, 2^3611320636 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 3611320636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4030387200).

3611320636 is an abundant number, since it is smaller than the sum of its proper divisors (4449453764).

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

3611320636 is a wasteful number, since it uses less digits than its factorization.

3611320636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487 (or 1485 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 3611320636 is about 60094.2645849003. The cubic root of 3611320636 is about 1534.2236856554.

Adding to 3611320636 its reverse (6360231163), we get a palindrome (9971551799).

The spelling of 3611320636 in words is "three billion, six hundred eleven million, three hundred twenty thousand, six hundred thirty-six".