38840621265 has 24 divisors (see below), whose sum is σ = 68245992360. Its totient is φ = 20431229184.

The previous prime is 38840621263. The next prime is 38840621297. The reversal of 38840621265 is 56212604883.

38840621265 is a `hidden beast` number, since 388 + 4 + 0 + 6 + 2 + 1 + 265 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6333613056 + 32507008209 = 79584^2 + 180297^2 .

It is not a de Polignac number, because 38840621265 - 2¹ = 38840621263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 38840621265.

It is not an unprimeable number, because it can be changed into a prime (38840621263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5908530 + ... + 5915099.

It is an arithmetic number, because the mean of its divisors is an integer number (2843583015).

Almost surely, 2^38840621265 is an apocalyptic number.

It is an amenable number.

38840621265 is a deficient number, since it is larger than the sum of its proper divisors (29405371095).

38840621265 is a wasteful number, since it uses less digits than its factorization.

38840621265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11823713 (or 11823710 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 38840621265 in words is "thirty-eight billion, eight hundred forty million, six hundred twenty-one thousand, two hundred sixty-five".