2585270861 has 4 divisors (see below), whose sum is σ = 2640276672. Its totient is φ = 2530265052.

The previous prime is 2585270827. The next prime is 2585270873. The reversal of 2585270861 is 1680725852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2585270861 - 2⁶ = 2585270797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2585470861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27502835 + ... + 27502928.

It is an arithmetic number, because the mean of its divisors is an integer number (660069168).

Almost surely, 2^2585270861 is an apocalyptic number.

It is an amenable number.

2585270861 is a deficient number, since it is larger than the sum of its proper divisors (55005811).

2585270861 is an equidigital number, since it uses as much as digits as its factorization.

2585270861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55005810.

The product of its (nonzero) digits is 268800, while the sum is 44.

The square root of 2585270861 is about 50845.5589112756. The cubic root of 2585270861 is about 1372.4673353850.

The spelling of 2585270861 in words is "two billion, five hundred eighty-five million, two hundred seventy thousand, eight hundred sixty-one".