1650682865 has 16 divisors (see below), whose sum is σ = 2134146000. Its totient is φ = 1218419712.

The previous prime is 1650682861. The next prime is 1650682867. The reversal of 1650682865 is 5682860561.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 693584896 + 957097969 = 26336^2 + 30937^2 .

It is a cyclic number.

It is not a de Polignac number, because 1650682865 - 2² = 1650682861 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1650682861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194021 + ... + 202349.

It is an arithmetic number, because the mean of its divisors is an integer number (133384125).

Almost surely, 2^1650682865 is an apocalyptic number.

It is an amenable number.

1650682865 is a deficient number, since it is larger than the sum of its proper divisors (483463135).

1650682865 is a wasteful number, since it uses less digits than its factorization.

1650682865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11396.

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

The square root of 1650682865 is about 40628.5966407898. The cubic root of 1650682865 is about 1181.8287417588.

The spelling of 1650682865 in words is "one billion, six hundred fifty million, six hundred eighty-two thousand, eight hundred sixty-five".