650245865 has 4 divisors (see below), whose sum is σ = 780295044. Its totient is φ = 520196688.

The previous prime is 650245793. The next prime is 650245889. The reversal of 650245865 is 568542056.

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 301751641 + 348494224 = 17371^2 + 18668^2 .

It is a cyclic number.

It is not a de Polignac number, because 650245865 - 2¹⁸ = 649983721 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65024582 + ... + 65024591.

It is an arithmetic number, because the mean of its divisors is an integer number (195073761).

Almost surely, 2^650245865 is an apocalyptic number.

It is an amenable number.

650245865 is a deficient number, since it is larger than the sum of its proper divisors (130049179).

650245865 is a wasteful number, since it uses less digits than its factorization.

650245865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130049178.

The product of its (nonzero) digits is 288000, while the sum is 41.

The square root of 650245865 is about 25499.9189214397. The cubic root of 650245865 is about 866.3483109973.

The spelling of 650245865 in words is "six hundred fifty million, two hundred forty-five thousand, eight hundred sixty-five".