2563585987 has 4 divisors (see below), whose sum is σ = 2565309160. Its totient is φ = 2561862816.

The previous prime is 2563585979. The next prime is 2563586023. The reversal of 2563585987 is 7895853652.

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

It is a cyclic number.

It is not a de Polignac number, because 2563585987 - 2³ = 2563585979 is a prime.

It is a super-2 number, since 2×2563585987² = 13143946225485528338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2563585187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 859353 + ... + 862330.

It is an arithmetic number, because the mean of its divisors is an integer number (641327290).

Almost surely, 2^2563585987 is an apocalyptic number.

2563585987 is a deficient number, since it is larger than the sum of its proper divisors (1723173).

2563585987 is a wasteful number, since it uses less digits than its factorization.

2563585987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723172.

The product of its digits is 18144000, while the sum is 58.

The square root of 2563585987 is about 50631.8673070627. The cubic root of 2563585987 is about 1368.6192042765.

The spelling of 2563585987 in words is "two billion, five hundred sixty-three million, five hundred eighty-five thousand, nine hundred eighty-seven".