9991474556448 has 144 divisors (see below), whose sum is σ = 32947094053440. Its totient is φ = 2595188175360.

The previous prime is 9991474556411. The next prime is 9991474556473. The reversal of 9991474556448 is 8446554741999.

It is a super-3 number, since 3×9991474556448³ (a number of 40 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9991474556448.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 61357803 + ... + 61520426.

It is an arithmetic number, because the mean of its divisors is an integer number (228799264260).

Almost surely, 2^{9991474556448} is an apocalyptic number.

It is an amenable number.

9991474556448 is an abundant number, since it is smaller than the sum of its proper divisors (22955619496992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9991474556448 is a wasteful number, since it uses less digits than its factorization.

9991474556448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122878271 (or 122878252 counting only the distinct ones).

The product of its digits is 1567641600, while the sum is 75.

The spelling of 9991474556448 in words is "nine trillion, nine hundred ninety-one billion, four hundred seventy-four million, five hundred fifty-six thousand, four hundred forty-eight".