65639744108 has 24 divisors (see below), whose sum is σ = 118844243280. Its totient is φ = 31684506560.

The previous prime is 65639744077. The next prime is 65639744117. The reversal of 65639744108 is 80144793656.

It is a self number, because there is not a number n which added to its sum of digits gives 65639744108.

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 7 ways as a sum of consecutive naturals, for example, 1171010 + ... + 1225782.

It is an arithmetic number, because the mean of its divisors is an integer number (4951843470).

Almost surely, 2^65639744108 is an apocalyptic number.

It is an amenable number.

65639744108 is a deficient number, since it is larger than the sum of its proper divisors (53204499172).

65639744108 is a wasteful number, since it uses less digits than its factorization.

65639744108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65137 (or 65135 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 65639744108 in words is "sixty-five billion, six hundred thirty-nine million, seven hundred forty-four thousand, one hundred eight".