1865795849 has 6 divisors (see below), whose sum is σ = 1982004894. Its totient is φ = 1756042880.

The previous prime is 1865795821. The next prime is 1865795863. The reversal of 1865795849 is 9485975681.

It can be written as a sum of positive squares in 3 ways, for example, as 323820025 + 1541975824 = 17995^2 + 39268^2 .

It is not a de Polignac number, because 1865795849 - 2¹⁶ = 1865730313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1865795791 and 1865795800.

It is not an unprimeable number, because it can be changed into a prime (1865795819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3227732 + ... + 3228309.

It is an arithmetic number, because the mean of its divisors is an integer number (330334149).

Almost surely, 2^1865795849 is an apocalyptic number.

It is an amenable number.

1865795849 is a deficient number, since it is larger than the sum of its proper divisors (116209045).

1865795849 is an equidigital number, since it uses as much as digits as its factorization.

1865795849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6456075 (or 6456058 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 62.

The square root of 1865795849 is about 43194.8590575314. The cubic root of 1865795849 is about 1231.0850031369.

The spelling of 1865795849 in words is "one billion, eight hundred sixty-five million, seven hundred ninety-five thousand, eight hundred forty-nine".