865872936515 has 16 divisors (see below), whose sum is σ = 1049490092448. Its totient is φ = 685769711616.

The previous prime is 865872936491. The next prime is 865872936521. The reversal of 865872936515 is 515639278568.

It is a cyclic number.

It is not a de Polignac number, because 865872936515 - 2⁶ = 865872936451 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 1857512 + ... + 2276421.

It is an arithmetic number, because the mean of its divisors is an integer number (65593130778).

Almost surely, 2^865872936515 is an apocalyptic number.

865872936515 is a deficient number, since it is larger than the sum of its proper divisors (183617155933).

865872936515 is a wasteful number, since it uses less digits than its factorization.

865872936515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4134358.

The product of its digits is 108864000, while the sum is 65.

The spelling of 865872936515 in words is "eight hundred sixty-five billion, eight hundred seventy-two million, nine hundred thirty-six thousand, five hundred fifteen".