865324520385 has 32 divisors (see below), whose sum is σ = 1542435229440. Its totient is φ = 411316055808.

The previous prime is 865324520351. The next prime is 865324520399. The reversal of 865324520385 is 583025423568.

865324520385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 865324520385 - 2¹⁶ = 865324454849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76504029 + ... + 76515338.

It is an arithmetic number, because the mean of its divisors is an integer number (48201100920).

Almost surely, 2^865324520385 is an apocalyptic number.

It is an amenable number.

865324520385 is a deficient number, since it is larger than the sum of its proper divisors (677110709055).

865324520385 is a wasteful number, since it uses less digits than its factorization.

865324520385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153019417.

The product of its (nonzero) digits is 6912000, while the sum is 51.

The spelling of 865324520385 in words is "eight hundred sixty-five billion, three hundred twenty-four million, five hundred twenty thousand, three hundred eighty-five".