865065138905 has 16 divisors (see below), whose sum is σ = 1133887909824. Its totient is φ = 628338838080.

The previous prime is 865065138901. The next prime is 865065138943. The reversal of 865065138905 is 509831560568.

It is not a de Polignac number, because 865065138905 - 2² = 865065138901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (865065138901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9949382 + ... + 10035951.

It is an arithmetic number, because the mean of its divisors is an integer number (70867994364).

Almost surely, 2^865065138905 is an apocalyptic number.

It is an amenable number.

865065138905 is a deficient number, since it is larger than the sum of its proper divisors (268822770919).

865065138905 is a wasteful number, since it uses less digits than its factorization.

865065138905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19986136.

The product of its (nonzero) digits is 7776000, while the sum is 56.

The spelling of 865065138905 in words is "eight hundred sixty-five billion, sixty-five million, one hundred thirty-eight thousand, nine hundred five".