9504199666944 has 72 divisors (see below), whose sum is σ = 28105590470720. Its totient is φ = 3168066553344.

The previous prime is 9504199666943. The next prime is 9504199666979. The reversal of 9504199666944 is 4496669914059.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×9504199666944² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9504199666943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687507532 + ... + 687521355.

Almost surely, 2^{9504199666944} is an apocalyptic number.

It is an amenable number.

9504199666944 is an abundant number, since it is smaller than the sum of its proper divisors (18601390803776).

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

9504199666944 is a wasteful number, since it uses less digits than its factorization.

9504199666944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375028912 (or 1375028892 counting only the distinct ones).

The product of its (nonzero) digits is 453496320, while the sum is 72.

The spelling of 9504199666944 in words is "nine trillion, five hundred four billion, one hundred ninety-nine million, six hundred sixty-six thousand, nine hundred forty-four".