3611197566 has 80 divisors (see below), whose sum is σ = 8409258000. Its totient is φ = 1156885632.

The previous prime is 3611197561. The next prime is 3611197591. The reversal of 3611197566 is 6657911163.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3611197561) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1092985 + ... + 1096283.

It is an arithmetic number, because the mean of its divisors is an integer number (105115725).

Almost surely, 2^3611197566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3611197566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4204629000).

3611197566 is an abundant number, since it is smaller than the sum of its proper divisors (4798060434).

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

3611197566 is a wasteful number, since it uses less digits than its factorization.

3611197566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575 (or 3566 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 3611197566 is about 60093.2406015851. The cubic root of 3611197566 is about 1534.2062572155.

The spelling of 3611197566 in words is "three billion, six hundred eleven million, one hundred ninety-seven thousand, five hundred sixty-six".