865509295631325 has 24 divisors (see below), whose sum is σ = 1515150390472128. Its totient is φ = 434451724865280.

The previous prime is 865509295631297. The next prime is 865509295631333. The reversal of 865509295631325 is 523136592905568.

It is not a de Polignac number, because 865509295631325 - 2⁹ = 865509295630813 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 865509295631325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 339415408777 + ... + 339415411326.

It is an arithmetic number, because the mean of its divisors is an integer number (63131266269672).

Almost surely, 2^{865509295631325} is an apocalyptic number.

865509295631325 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

865509295631325 is a deficient number, since it is larger than the sum of its proper divisors (649641094840803).

865509295631325 is a wasteful number, since it uses less digits than its factorization.

865509295631325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678830820133 (or 678830820128 counting only the distinct ones).

The product of its (nonzero) digits is 524880000, while the sum is 69.

The spelling of 865509295631325 in words is "eight hundred sixty-five trillion, five hundred nine billion, two hundred ninety-five million, six hundred thirty-one thousand, three hundred twenty-five".