10218862865 has 4 divisors (see below), whose sum is σ = 12262635444. Its totient is φ = 8175090288.

The previous prime is 10218862813. The next prime is 10218862949. The reversal of 10218862865 is 56826881201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56826881201 = 3533 ⋅16084597.

It can be written as a sum of positive squares in 2 ways, for example, as 5486661184 + 4732201681 = 74072^2 + 68791^2 .

It is a cyclic number.

It is not a de Polignac number, because 10218862865 - 2¹⁴ = 10218846481 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021886282 + ... + 1021886291.

It is an arithmetic number, because the mean of its divisors is an integer number (3065658861).

Almost surely, 2^10218862865 is an apocalyptic number.

It is an amenable number.

10218862865 is a deficient number, since it is larger than the sum of its proper divisors (2043772579).

10218862865 is an equidigital number, since it uses as much as digits as its factorization.

10218862865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043772578.

The product of its (nonzero) digits is 368640, while the sum is 47.

The spelling of 10218862865 in words is "ten billion, two hundred eighteen million, eight hundred sixty-two thousand, eight hundred sixty-five".