3867324728865 has 16 divisors (see below), whose sum is σ = 6663697994688. Its totient is φ = 1903913712576.

The previous prime is 3867324728863. The next prime is 3867324728881. The reversal of 3867324728865 is 5688274237683.

It is not a de Polignac number, because 3867324728865 - 2¹ = 3867324728863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3867324728865.

It is not an unprimeable number, because it can be changed into a prime (3867324728863) 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, 9916217059 + ... + 9916217448.

It is an arithmetic number, because the mean of its divisors is an integer number (416481124668).

Almost surely, 2^{3867324728865} is an apocalyptic number.

It is an amenable number.

3867324728865 is a deficient number, since it is larger than the sum of its proper divisors (2796373265823).

3867324728865 is a wasteful number, since it uses less digits than its factorization.

3867324728865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19832434528.

The product of its digits is 650280960, while the sum is 69.

The spelling of 3867324728865 in words is "three trillion, eight hundred sixty-seven billion, three hundred twenty-four million, seven hundred twenty-eight thousand, eight hundred sixty-five".