2581285853 has 8 divisors (see below), whose sum is σ = 2670900600. Its totient is φ = 2491711488.

The previous prime is 2581285849. The next prime is 2581285867. The reversal of 2581285853 is 3585821852.

It can be written as a sum of positive squares in 4 ways, for example, as 180579844 + 2400706009 = 13438^2 + 48997^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2581285853 - 2² = 2581285849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2581285798 and 2581285807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581285753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182525 + ... + 196157.

It is an arithmetic number, because the mean of its divisors is an integer number (333862575).

Almost surely, 2^2581285853 is an apocalyptic number.

It is an amenable number.

2581285853 is a deficient number, since it is larger than the sum of its proper divisors (89614747).

2581285853 is a wasteful number, since it uses less digits than its factorization.

2581285853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20191.

The product of its digits is 768000, while the sum is 47.

The square root of 2581285853 is about 50806.3564231878. The cubic root of 2581285853 is about 1371.7617863745.

The spelling of 2581285853 in words is "two billion, five hundred eighty-one million, two hundred eighty-five thousand, eight hundred fifty-three".