9938443651456 has 16 divisors (see below), whose sum is σ = 19799243212140. Its totient is φ = 4969221825664.

The previous prime is 9938443651447. The next prime is 9938443651457. The reversal of 9938443651456 is 6541563448399.

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 9938443651391 and 9938443651400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9938443651457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38822045386 + ... + 38822045641.

Almost surely, 2^{9938443651456} is an apocalyptic number.

It is an amenable number.

9938443651456 is a deficient number, since it is larger than the sum of its proper divisors (9860799560684).

9938443651456 is an equidigital number, since it uses as much as digits as its factorization.

9938443651456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77644091041 (or 77644091029 counting only the distinct ones).

The product of its digits is 335923200, while the sum is 67.

The spelling of 9938443651456 in words is "nine trillion, nine hundred thirty-eight billion, four hundred forty-three million, six hundred fifty-one thousand, four hundred fifty-six".