9388347249681 has 63 divisors (see below), whose sum is σ = 14161311009867. Its totient is φ = 6221228846400.

The previous prime is 9388347249679. The next prime is 9388347249689. The reversal of 9388347249681 is 1869427438839.

The square root of 9388347249681 is 3064041.

It is a perfect power (a square), and thus also a powerful number.

9388347249681 is a `hidden beast` number, since 9 + 38 + 8 + 3 + 472 + 49 + 6 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9294931440081 + 93415809600 = 3048759^2 + 305640^2 .

It is not a de Polignac number, because 9388347249681 - 2¹ = 9388347249679 is a prime.

It is a super-2 number, since 2×9388347249681² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9388347249689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 23412337081 + ... + 23412337481.

Almost surely, 2^{9388347249681} is an apocalyptic number.

9388347249681 is the 3064041-st square number.

9388347249681 is the 1532021-st centered octagonal number.

It is an amenable number.

9388347249681 is a deficient number, since it is larger than the sum of its proper divisors (4772963760186).

9388347249681 is an frugal number, since it uses more digits than its factorization.

9388347249681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386 (or 687 counting only the distinct ones).

The product of its digits is 501645312, while the sum is 72.

The spelling of 9388347249681 in words is "nine trillion, three hundred eighty-eight billion, three hundred forty-seven million, two hundred forty-nine thousand, six hundred eighty-one".