65381515717 has 16 divisors (see below), whose sum is σ = 76219983360. Its totient is φ = 54927969408.

The previous prime is 65381515711. The next prime is 65381515757. The reversal of 65381515717 is 71751518356.

It is not a de Polignac number, because 65381515717 - 2²³ = 65373127109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65381515711) 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 15 ways as a sum of consecutive naturals, for example, 355738 + ... + 507259.

It is an arithmetic number, because the mean of its divisors is an integer number (4763748960).

Almost surely, 2^65381515717 is an apocalyptic number.

It is an amenable number.

65381515717 is a deficient number, since it is larger than the sum of its proper divisors (10838467643).

65381515717 is a wasteful number, since it uses less digits than its factorization.

65381515717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863220.

The product of its digits is 882000, while the sum is 49.

The spelling of 65381515717 in words is "sixty-five billion, three hundred eighty-one million, five hundred fifteen thousand, seven hundred seventeen".