2581560457 has 24 divisors (see below), whose sum is σ = 3249265536. Its totient is φ = 2005115904.

The previous prime is 2581560439. The next prime is 2581560467. The reversal of 2581560457 is 7540651852.

It is a de Polignac number, because none of the positive numbers 2^k-2581560457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2581560407) 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 23 ways as a sum of consecutive naturals, for example, 35913 + ... + 80329.

It is an arithmetic number, because the mean of its divisors is an integer number (135386064).

Almost surely, 2^2581560457 is an apocalyptic number.

It is an amenable number.

2581560457 is a deficient number, since it is larger than the sum of its proper divisors (667705079).

2581560457 is a wasteful number, since it uses less digits than its factorization.

2581560457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44485 (or 44466 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 43.

The square root of 2581560457 is about 50809.0588084448. The cubic root of 2581560457 is about 1371.8104285291.

The spelling of 2581560457 in words is "two billion, five hundred eighty-one million, five hundred sixty thousand, four hundred fifty-seven".