7997718897 has 96 divisors (see below), whose sum is σ = 14062930560. Its totient is φ = 4478302080.

The previous prime is 7997718877. The next prime is 7997718899. The reversal of 7997718897 is 7988177997.

It is not a de Polignac number, because 7997718897 - 2¹⁰ = 7997717873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7997718899) 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 95 ways as a sum of consecutive naturals, for example, 18996747 + ... + 18997167.

It is an arithmetic number, because the mean of its divisors is an integer number (146488860).

Almost surely, 2^7997718897 is an apocalyptic number.

It is an amenable number.

7997718897 is a deficient number, since it is larger than the sum of its proper divisors (6065211663).

7997718897 is a wasteful number, since it uses less digits than its factorization.

7997718897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700 (or 687 counting only the distinct ones).

The product of its digits is 112021056, while the sum is 72.

The square root of 7997718897 is about 89429.9664374308. The cubic root of 7997718897 is about 1999.8098900130.

The spelling of 7997718897 in words is "seven billion, nine hundred ninety-seven million, seven hundred eighteen thousand, eight hundred ninety-seven".