9438891946911 has 24 divisors (see below), whose sum is σ = 15581895548960. Its totient is φ = 5393572007616.

The previous prime is 9438891946889. The next prime is 9438891946921. The reversal of 9438891946911 is 1196491988349.

9438891946911 is a `hidden beast` number, since 9 + 4 + 388 + 91 + 94 + 69 + 11 = 666.

It is not a de Polignac number, because 9438891946911 - 2¹⁴ = 9438891930527 is a prime.

It is a super-2 number, since 2×9438891946911² (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 9438891946911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9438891946921) 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, 3269901 + ... + 5437833.

Almost surely, 2^{9438891946911} is an apocalyptic number.

9438891946911 is a deficient number, since it is larger than the sum of its proper divisors (6143003602049).

9438891946911 is a wasteful number, since it uses less digits than its factorization.

9438891946911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237055 (or 2237052 counting only the distinct ones).

The product of its digits is 120932352, while the sum is 72.

The spelling of 9438891946911 in words is "nine trillion, four hundred thirty-eight billion, eight hundred ninety-one million, nine hundred forty-six thousand, nine hundred eleven".