1650865841 has 2 divisors, whose sum is σ = 1650865842. Its totient is φ = 1650865840.

The previous prime is 1650865817. The next prime is 1650865859. The reversal of 1650865841 is 1485680561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1451914816 + 198951025 = 38104^2 + 14105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1650865841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1650865792 and 1650865801.

It is not a weakly prime, because it can be changed into another prime (1650865891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825432920 + 825432921.

It is an arithmetic number, because the mean of its divisors is an integer number (825432921).

Almost surely, 2^1650865841 is an apocalyptic number.

It is an amenable number.

1650865841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1650865841 is an equidigital number, since it uses as much as digits as its factorization.

1650865841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 44.

The square root of 1650865841 is about 40630.8483913393. The cubic root of 1650865841 is about 1181.8724081934.

The spelling of 1650865841 in words is "one billion, six hundred fifty million, eight hundred sixty-five thousand, eight hundred forty-one".