2085638449 has 4 divisors (see below), whose sum is σ = 2087105536. Its totient is φ = 2084171364.

The previous prime is 2085638437. The next prime is 2085638453. The reversal of 2085638449 is 9448365802.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9448365802 = 2 ⋅4724182901.

It is a cyclic number.

It is not a de Polignac number, because 2085638449 - 2¹¹ = 2085636401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2085632449) 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, 731409 + ... + 734254.

It is an arithmetic number, because the mean of its divisors is an integer number (521776384).

Almost surely, 2^2085638449 is an apocalyptic number.

It is an amenable number.

2085638449 is a deficient number, since it is larger than the sum of its proper divisors (1467087).

2085638449 is a wasteful number, since it uses less digits than its factorization.

2085638449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467086.

The product of its (nonzero) digits is 1658880, while the sum is 49.

The square root of 2085638449 is about 45668.7907547375. The cubic root of 2085638449 is about 1277.6532621987.

The spelling of 2085638449 in words is "two billion, eighty-five million, six hundred thirty-eight thousand, four hundred forty-nine".