8438193444031 has 4 divisors (see below), whose sum is σ = 9087285247432. Its totient is φ = 7789101640632.

The previous prime is 8438193444011. The next prime is 8438193444047. The reversal of 8438193444031 is 1304443918348.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 8438193444031 - 2¹¹ = 8438193441983 is a prime.

It is a super-2 number, since 2×8438193444031² (a number of 27 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 8438193444031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8438193444011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324545901681 + ... + 324545901706.

It is an arithmetic number, because the mean of its divisors is an integer number (2271821311858).

Almost surely, 2^{8438193444031} is an apocalyptic number.

8438193444031 is a deficient number, since it is larger than the sum of its proper divisors (649091803401).

8438193444031 is a wasteful number, since it uses less digits than its factorization.

8438193444031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649091803400.

The product of its (nonzero) digits is 3981312, while the sum is 52.

The spelling of 8438193444031 in words is "eight trillion, four hundred thirty-eight billion, one hundred ninety-three million, four hundred forty-four thousand, thirty-one".