6547427971 has 6 divisors (see below), whose sum is σ = 7616395860. Its totient is φ = 5612081076.

The previous prime is 6547427951. The next prime is 6547427983. The reversal of 6547427971 is 1797247456.

It is a happy number.

It is not a de Polignac number, because 6547427971 - 2⁹ = 6547427459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6547427951) 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 5 ways as a sum of consecutive naturals, for example, 66810441 + ... + 66810538.

It is an arithmetic number, because the mean of its divisors is an integer number (1269399310).

Almost surely, 2^6547427971 is an apocalyptic number.

6547427971 is a deficient number, since it is larger than the sum of its proper divisors (1068967889).

6547427971 is a wasteful number, since it uses less digits than its factorization.

6547427971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133620993 (or 133620986 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 52.

The square root of 6547427971 is about 80916.1786727475. The cubic root of 6547427971 is about 1870.7836965091.

The spelling of 6547427971 in words is "six billion, five hundred forty-seven million, four hundred twenty-seven thousand, nine hundred seventy-one".