38855171831 has 16 divisors (see below), whose sum is σ = 49062288384. Its totient is φ = 29982505344.

The previous prime is 38855171827. The next prime is 38855171921. The reversal of 38855171831 is 13817155883.

It is a cyclic number.

It is not a de Polignac number, because 38855171831 - 2² = 38855171827 is a prime.

It is a super-2 number, since 2×38855171831² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38855171831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38855170831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7095395 + ... + 7100868.

It is an arithmetic number, because the mean of its divisors is an integer number (3066393024).

Almost surely, 2^38855171831 is an apocalyptic number.

38855171831 is a deficient number, since it is larger than the sum of its proper divisors (10207116553).

38855171831 is a wasteful number, since it uses less digits than its factorization.

38855171831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14196310.

The product of its digits is 806400, while the sum is 50.

The spelling of 38855171831 in words is "thirty-eight billion, eight hundred fifty-five million, one hundred seventy-one thousand, eight hundred thirty-one".