2581604587 has 2 divisors, whose sum is σ = 2581604588. Its totient is φ = 2581604586.

The previous prime is 2581604561. The next prime is 2581604611. The reversal of 2581604587 is 7854061852.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2581604587 is a prime.

It is not a weakly prime, because it can be changed into another prime (2581644587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1290802293 + 1290802294.

It is an arithmetic number, because the mean of its divisors is an integer number (1290802294).

Almost surely, 2^2581604587 is an apocalyptic number.

2581604587 is a deficient number, since it is larger than the sum of its proper divisors (1).

2581604587 is an equidigital number, since it uses as much as digits as its factorization.

2581604587 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2581604587 is about 50809.4930795417. The cubic root of 2581604587 is about 1371.8182452030.

The spelling of 2581604587 in words is "two billion, five hundred eighty-one million, six hundred four thousand, five hundred eighty-seven".