865873788315 has 16 divisors (see below), whose sum is σ = 1396306710528. Its totient is φ = 458163137376.

The previous prime is 865873788313. The next prime is 865873788319. The reversal of 865873788315 is 513887378568.

It is not a de Polignac number, because 865873788315 - 2¹ = 865873788313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 865873788315.

It is not an unprimeable number, because it can be changed into a prime (865873788313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227261557 + ... + 227265366.

It is an arithmetic number, because the mean of its divisors is an integer number (87269169408).

Almost surely, 2^865873788315 is an apocalyptic number.

865873788315 is a deficient number, since it is larger than the sum of its proper divisors (530432922213).

865873788315 is a wasteful number, since it uses less digits than its factorization.

865873788315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454527058.

The product of its digits is 270950400, while the sum is 69.

The spelling of 865873788315 in words is "eight hundred sixty-five billion, eight hundred seventy-three million, seven hundred eighty-eight thousand, three hundred fifteen".