2563587913 has 4 divisors (see below), whose sum is σ = 2714387220. Its totient is φ = 2412788608.

The previous prime is 2563587857. The next prime is 2563587919. The reversal of 2563587913 is 3197853652.

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

It can be written as a sum of positive squares in 2 ways, for example, as 769896009 + 1793691904 = 27747^2 + 42352^2 .

It is a cyclic number.

It is not a de Polignac number, because 2563587913 - 2¹³ = 2563579721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2563587919) 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, 75399628 + ... + 75399661.

It is an arithmetic number, because the mean of its divisors is an integer number (678596805).

Almost surely, 2^2563587913 is an apocalyptic number.

It is an amenable number.

2563587913 is a deficient number, since it is larger than the sum of its proper divisors (150799307).

2563587913 is a wasteful number, since it uses less digits than its factorization.

2563587913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150799306.

The product of its digits is 1360800, while the sum is 49.

The square root of 2563587913 is about 50631.8863267013. The cubic root of 2563587913 is about 1368.6195470203.

The spelling of 2563587913 in words is "two billion, five hundred sixty-three million, five hundred eighty-seven thousand, nine hundred thirteen".