2085850649 has 4 divisors (see below), whose sum is σ = 2208547764. Its totient is φ = 1963153536.

The previous prime is 2085850643. The next prime is 2085850693. The reversal of 2085850649 is 9460585802.

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 1950547225 + 135303424 = 44165^2 + 11632^2 .

It is a cyclic number.

It is not a de Polignac number, because 2085850649 - 2¹⁶ = 2085785113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2085850643) 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, 61348532 + ... + 61348565.

It is an arithmetic number, because the mean of its divisors is an integer number (552136941).

Almost surely, 2^2085850649 is an apocalyptic number.

It is an amenable number.

2085850649 is a deficient number, since it is larger than the sum of its proper divisors (122697115).

2085850649 is a wasteful number, since it uses less digits than its factorization.

2085850649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122697114.

The product of its (nonzero) digits is 691200, while the sum is 47.

The square root of 2085850649 is about 45671.1139452499. The cubic root of 2085850649 is about 1277.6965916691.

The spelling of 2085850649 in words is "two billion, eighty-five million, eight hundred fifty thousand, six hundred forty-nine".