3561617665 has 8 divisors (see below), whose sum is σ = 4274262720. Its totient is φ = 2849079792.

The previous prime is 3561617663. The next prime is 3561617707. The reversal of 3561617665 is 5667161653.

3561617665 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3561617665 - 2¹ = 3561617663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3561617663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107622 + ... + 136768.

It is an arithmetic number, because the mean of its divisors is an integer number (534282840).

Almost surely, 2^3561617665 is an apocalyptic number.

It is an amenable number.

3561617665 is a deficient number, since it is larger than the sum of its proper divisors (712645055).

3561617665 is a wasteful number, since it uses less digits than its factorization.

3561617665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53591.

The product of its digits is 680400, while the sum is 46.

The square root of 3561617665 is about 59679.2900845846. The cubic root of 3561617665 is about 1527.1525871057.

The spelling of 3561617665 in words is "three billion, five hundred sixty-one million, six hundred seventeen thousand, six hundred sixty-five".