4138802685 has 12 divisors (see below), whose sum is σ = 7173924732. Its totient is φ = 2207361408.

The previous prime is 4138802663. The next prime is 4138802713. The reversal of 4138802685 is 5862088314.

4138802685 is a `hidden beast` number, since 4 + 1 + 388 + 0 + 268 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1166154201 + 2972648484 = 34149^2 + 54522^2 .

It is not a de Polignac number, because 4138802685 - 2⁶ = 4138802621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 91973393 = 4138802685 / (4 + 1 + 3 + 8 + 8 + 0 + 2 + 6 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 4138802685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45986652 + ... + 45986741.

It is an arithmetic number, because the mean of its divisors is an integer number (597827061).

Almost surely, 2^4138802685 is an apocalyptic number.

4138802685 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4138802685 is a deficient number, since it is larger than the sum of its proper divisors (3035122047).

4138802685 is a wasteful number, since it uses less digits than its factorization.

4138802685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91973404 (or 91973401 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The square root of 4138802685 is about 64333.5269124894. The cubic root of 4138802685 is about 1605.5539648899.

The spelling of 4138802685 in words is "four billion, one hundred thirty-eight million, eight hundred two thousand, six hundred eighty-five".