2561580847 has 4 divisors (see below), whose sum is σ = 2927520976. Its totient is φ = 2195640720.

The previous prime is 2561580839. The next prime is 2561580883. The reversal of 2561580847 is 7480851652.

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

It is not a de Polignac number, because 2561580847 - 2³ = 2561580839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2561580797 and 2561580806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561580347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182970054 + ... + 182970067.

It is an arithmetic number, because the mean of its divisors is an integer number (731880244).

Almost surely, 2^2561580847 is an apocalyptic number.

2561580847 is a deficient number, since it is larger than the sum of its proper divisors (365940129).

2561580847 is an equidigital number, since it uses as much as digits as its factorization.

2561580847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365940128.

The product of its (nonzero) digits is 537600, while the sum is 46.

The square root of 2561580847 is about 50612.0622678033. The cubic root of 2561580847 is about 1368.2622838110.

The spelling of 2561580847 in words is "two billion, five hundred sixty-one million, five hundred eighty thousand, eight hundred forty-seven".