3085207561 has 4 divisors (see below), whose sum is σ = 3086496000. Its totient is φ = 3083919124.

The previous prime is 3085207547. The next prime is 3085207579. The reversal of 3085207561 is 1657025803.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3085207561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3085207561.

It is not an unprimeable number, because it can be changed into a prime (3085207591) 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, 640621 + ... + 645418.

It is an arithmetic number, because the mean of its divisors is an integer number (771624000).

Almost surely, 2^3085207561 is an apocalyptic number.

It is an amenable number.

3085207561 is a deficient number, since it is larger than the sum of its proper divisors (1288439).

3085207561 is a wasteful number, since it uses less digits than its factorization.

3085207561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288438.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 3085207561 is about 55544.6447553677. The cubic root of 3085207561 is about 1455.7768057489.

The spelling of 3085207561 in words is "three billion, eighty-five million, two hundred seven thousand, five hundred sixty-one".