65648203109 has 32 divisors (see below), whose sum is σ = 68796241920. Its totient is φ = 62608392000.

The previous prime is 65648203087. The next prime is 65648203141. The reversal of 65648203109 is 90130284656.

It is a cyclic number.

It is not a de Polignac number, because 65648203109 - 2³² = 61353235813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65648203109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65648203199) 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 31 ways as a sum of consecutive naturals, for example, 66783032 + ... + 66784014.

It is an arithmetic number, because the mean of its divisors is an integer number (2149882560).

Almost surely, 2^65648203109 is an apocalyptic number.

It is an amenable number.

65648203109 is a deficient number, since it is larger than the sum of its proper divisors (3148038811).

65648203109 is a wasteful number, since it uses less digits than its factorization.

65648203109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 65648203109 in words is "sixty-five billion, six hundred forty-eight million, two hundred three thousand, one hundred nine".