2585381629 has 4 divisors (see below), whose sum is σ = 2591523100. Its totient is φ = 2579240160.

The previous prime is 2585381627. The next prime is 2585381647. The reversal of 2585381629 is 9261835852.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 233325625 + 2352056004 = 15275^2 + 48498^2 .

It is a cyclic number.

It is not a de Polignac number, because 2585381629 - 2¹ = 2585381627 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 (2585381621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3070104 + ... + 3070945.

It is an arithmetic number, because the mean of its divisors is an integer number (647880775).

Almost surely, 2^2585381629 is an apocalyptic number.

It is an amenable number.

2585381629 is a deficient number, since it is larger than the sum of its proper divisors (6141471).

2585381629 is an equidigital number, since it uses as much as digits as its factorization.

2585381629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6141470.

The product of its digits is 1036800, while the sum is 49.

The square root of 2585381629 is about 50846.6481589495. The cubic root of 2585381629 is about 1372.4869365923.

The spelling of 2585381629 in words is "two billion, five hundred eighty-five million, three hundred eighty-one thousand, six hundred twenty-nine".