1650465065 has 4 divisors (see below), whose sum is σ = 1980558084. Its totient is φ = 1320372048.

The previous prime is 1650465013. The next prime is 1650465143. The reversal of 1650465065 is 5605640561.

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 569633689 + 1080831376 = 23867^2 + 32876^2 .

It is a cyclic number.

It is not a de Polignac number, because 1650465065 - 2¹⁶ = 1650399529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165046502 + ... + 165046511.

It is an arithmetic number, because the mean of its divisors is an integer number (495139521).

Almost surely, 2^1650465065 is an apocalyptic number.

It is an amenable number.

1650465065 is a deficient number, since it is larger than the sum of its proper divisors (330093019).

1650465065 is an equidigital number, since it uses as much as digits as its factorization.

1650465065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330093018.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 1650465065 is about 40625.9161742846. The cubic root of 1650465065 is about 1181.7767605197.

The spelling of 1650465065 in words is "one billion, six hundred fifty million, four hundred sixty-five thousand, sixty-five".