2566241561 has 8 divisors (see below), whose sum is σ = 2765784000. Its totient is φ = 2367004752.

The previous prime is 2566241549. The next prime is 2566241567. The reversal of 2566241561 is 1651426652.

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 2566241561 - 2⁶ = 2566241497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2566241567) 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, 58811 + ... + 92688.

It is an arithmetic number, because the mean of its divisors is an integer number (345723000).

Almost surely, 2^2566241561 is an apocalyptic number.

It is an amenable number.

2566241561 is a deficient number, since it is larger than the sum of its proper divisors (199542439).

2566241561 is a wasteful number, since it uses less digits than its factorization.

2566241561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152815.

The product of its digits is 86400, while the sum is 38.

The square root of 2566241561 is about 50658.0848532591. The cubic root of 2566241561 is about 1369.0916174448.

The spelling of 2566241561 in words is "two billion, five hundred sixty-six million, two hundred forty-one thousand, five hundred sixty-one".