2539250865 has 24 divisors (see below), whose sum is σ = 4427736768. Its totient is φ = 1346153760.

The previous prime is 2539250851. The next prime is 2539250867. The reversal of 2539250865 is 5680529352.

2539250865 is a `hidden beast` number, since 2 + 53 + 92 + 508 + 6 + 5 = 666.

It is not a de Polignac number, because 2539250865 - 2³¹ = 391767217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2539250865.

It is not an unprimeable number, because it can be changed into a prime (2539250867) 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 23 ways as a sum of consecutive naturals, for example, 161431 + ... + 176460.

It is an arithmetic number, because the mean of its divisors is an integer number (184489032).

Almost surely, 2^2539250865 is an apocalyptic number.

It is an amenable number.

2539250865 is a deficient number, since it is larger than the sum of its proper divisors (1888485903).

2539250865 is a wasteful number, since it uses less digits than its factorization.

2539250865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338069 (or 338066 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The square root of 2539250865 is about 50390.9799964240. The cubic root of 2539250865 is about 1364.2748392335.

The spelling of 2539250865 in words is "two billion, five hundred thirty-nine million, two hundred fifty thousand, eight hundred sixty-five".