3005705561 has 4 divisors (see below), whose sum is σ = 3035465124. Its totient is φ = 2975946000.

The previous prime is 3005705543. The next prime is 3005705567. The reversal of 3005705561 is 1655075003.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2822265625 + 183439936 = 53125^2 + 13544^2 .

It is a cyclic number.

It is not a de Polignac number, because 3005705561 - 2¹⁴ = 3005689177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3005705567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14879630 + ... + 14879831.

It is an arithmetic number, because the mean of its divisors is an integer number (758866281).

Almost surely, 2^3005705561 is an apocalyptic number.

It is an amenable number.

3005705561 is a deficient number, since it is larger than the sum of its proper divisors (29759563).

3005705561 is a wasteful number, since it uses less digits than its factorization.

3005705561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29759562.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 3005705561 is about 54824.3154175225. The cubic root of 3005705561 is about 1443.1633071652.

The spelling of 3005705561 in words is "three billion, five million, seven hundred five thousand, five hundred sixty-one".