65609393956838 has 16 divisors (see below), whose sum is σ = 101232586543536. Its totient is φ = 31878157043040.

The previous prime is 65609393956787. The next prime is 65609393956879. The reversal of 65609393956838 is 83865939390656.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3239639981 + ... + 3239660232.

It is an arithmetic number, because the mean of its divisors is an integer number (6327036658971).

Almost surely, 2^{65609393956838} is an apocalyptic number.

65609393956838 is a deficient number, since it is larger than the sum of its proper divisors (35623192586698).

65609393956838 is a wasteful number, since it uses less digits than its factorization.

65609393956838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6479300359.

The product of its (nonzero) digits is 6802444800, while the sum is 80.

The spelling of 65609393956838 in words is "sixty-five trillion, six hundred nine billion, three hundred ninety-three million, nine hundred fifty-six thousand, eight hundred thirty-eight".