2528685857 has 16 divisors (see below), whose sum is σ = 2628439632. Its totient is φ = 2430766080.

The previous prime is 2528685847. The next prime is 2528685899. The reversal of 2528685857 is 7585868252.

2528685857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 377952481 + 2150733376 = 19441^2 + 46376^2 .

It is a cyclic number.

It is not a de Polignac number, because 2528685857 - 2¹⁰ = 2528684833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2528685847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1180007 + ... + 1182147.

It is an arithmetic number, because the mean of its divisors is an integer number (164277477).

Almost surely, 2^2528685857 is an apocalyptic number.

It is an amenable number.

2528685857 is a deficient number, since it is larger than the sum of its proper divisors (99753775).

2528685857 is a wasteful number, since it uses less digits than its factorization.

2528685857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548.

The product of its digits is 10752000, while the sum is 56.

The square root of 2528685857 is about 50286.0403790157. The cubic root of 2528685857 is about 1362.3801057366.

The spelling of 2528685857 in words is "two billion, five hundred twenty-eight million, six hundred eighty-five thousand, eight hundred fifty-seven".