650793642865 has 4 divisors (see below), whose sum is σ = 780952371444. Its totient is φ = 520634914288.

The previous prime is 650793642859. The next prime is 650793642869. The reversal of 650793642865 is 568246397056.

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 388928096881 + 261865545984 = 623641^2 + 511728^2 .

It is a cyclic number.

It is not a de Polignac number, because 650793642865 - 2¹¹ = 650793640817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650793642869) 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, 65079364282 + ... + 65079364291.

It is an arithmetic number, because the mean of its divisors is an integer number (195238092861).

Almost surely, 2^650793642865 is an apocalyptic number.

It is an amenable number.

650793642865 is a deficient number, since it is larger than the sum of its proper divisors (130158728579).

650793642865 is a wasteful number, since it uses less digits than its factorization.

650793642865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130158728578.

The product of its (nonzero) digits is 65318400, while the sum is 61.

The spelling of 650793642865 in words is "six hundred fifty billion, seven hundred ninety-three million, six hundred forty-two thousand, eight hundred sixty-five".