2585374861 has 2 divisors, whose sum is σ = 2585374862. Its totient is φ = 2585374860.

The previous prime is 2585374849. The next prime is 2585374873. The reversal of 2585374861 is 1684735852.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2585374849) and next prime (2585374873).

It can be written as a sum of positive squares in only one way, i.e., 1937672361 + 647702500 = 44019^2 + 25450^2 .

It is a cyclic number.

It is not a de Polignac number, because 2585374861 - 2⁵ = 2585374829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2585374811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1292687430 + 1292687431.

It is an arithmetic number, because the mean of its divisors is an integer number (1292687431).

Almost surely, 2^2585374861 is an apocalyptic number.

It is an amenable number.

2585374861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2585374861 is an equidigital number, since it uses as much as digits as its factorization.

2585374861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1612800, while the sum is 49.

The square root of 2585374861 is about 50846.5816058464. The cubic root of 2585374861 is about 1372.4857389613.

The spelling of 2585374861 in words is "two billion, five hundred eighty-five million, three hundred seventy-four thousand, eight hundred sixty-one".