7991641605792 has 192 divisors, whose sum is σ = 22950959302656. Its totient is φ = 2420095257600.

The previous prime is 7991641605769. The next prime is 7991641605821. The reversal of 7991641605792 is 2975061461997.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27095917 + ... + 27389267.

It is an arithmetic number, because the mean of its divisors is an integer number (119536246368).

Almost surely, 2^{7991641605792} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7991641605792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11475479651328).

7991641605792 is an abundant number, since it is smaller than the sum of its proper divisors (14959317696864).

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

7991641605792 is a wasteful number, since it uses less digits than its factorization.

7991641605792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293723 (or 293715 counting only the distinct ones).

The product of its (nonzero) digits is 51438240, while the sum is 66.

The spelling of 7991641605792 in words is "seven trillion, nine hundred ninety-one billion, six hundred forty-one million, six hundred five thousand, seven hundred ninety-two".