3565061561 has 8 divisors (see below), whose sum is σ = 3844226400. Its totient is φ = 3295049760.

The previous prime is 3565061537. The next prime is 3565061569. The reversal of 3565061561 is 1651605653.

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 3565061561 - 2²⁶ = 3497952697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3565061569) 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, 2287451 + ... + 2289008.

It is an arithmetic number, because the mean of its divisors is an integer number (480528300).

Almost surely, 2^3565061561 is an apocalyptic number.

It is an amenable number.

3565061561 is a deficient number, since it is larger than the sum of its proper divisors (279164839).

3565061561 is a wasteful number, since it uses less digits than its factorization.

3565061561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4576519.

The product of its (nonzero) digits is 81000, while the sum is 38.

The square root of 3565061561 is about 59708.1364723435. The cubic root of 3565061561 is about 1527.6446538122.

The spelling of 3565061561 in words is "three billion, five hundred sixty-five million, sixty-one thousand, five hundred sixty-one".