6547998897 has 24 divisors (see below), whose sum is σ = 10512747648. Its totient is φ = 3893604000.

The previous prime is 6547998889. The next prime is 6547998911. The reversal of 6547998897 is 7988997456.

6547998897 is a `hidden beast` number, since 65 + 479 + 9 + 8 + 8 + 97 = 666.

6547998897 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6547998897 - 2³ = 6547998889 is a prime.

It is a super-2 number, since 2×6547998897² = 85752579110226433218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6547998697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 618729 + ... + 629222.

It is an arithmetic number, because the mean of its divisors is an integer number (438031152).

Almost surely, 2^6547998897 is an apocalyptic number.

It is an amenable number.

6547998897 is a deficient number, since it is larger than the sum of its proper divisors (3964748751).

6547998897 is a wasteful number, since it uses less digits than its factorization.

6547998897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248021 (or 1248018 counting only the distinct ones).

The product of its digits is 274337280, while the sum is 72.

The square root of 6547998897 is about 80919.7064811780. The cubic root of 6547998897 is about 1870.8380714491.

The spelling of 6547998897 in words is "six billion, five hundred forty-seven million, nine hundred ninety-eight thousand, eight hundred ninety-seven".