65905938917 has 16 divisors (see below), whose sum is σ = 81121095552. Its totient is φ = 52141440960.

The previous prime is 65905938911. The next prime is 65905938953. The reversal of 65905938917 is 71983950956.

It is not a de Polignac number, because 65905938917 - 2¹⁰ = 65905937893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65905938917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65905938911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2098067 + ... + 2129247.

It is an arithmetic number, because the mean of its divisors is an integer number (5070068472).

Almost surely, 2^65905938917 is an apocalyptic number.

It is an amenable number.

65905938917 is a deficient number, since it is larger than the sum of its proper divisors (15215156635).

65905938917 is a wasteful number, since it uses less digits than its factorization.

65905938917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54428.

The product of its (nonzero) digits is 18370800, while the sum is 62.

The spelling of 65905938917 in words is "sixty-five billion, nine hundred five million, nine hundred thirty-eight thousand, nine hundred seventeen".