6471563897 has 2 divisors, whose sum is σ = 6471563898. Its totient is φ = 6471563896.

The previous prime is 6471563869. The next prime is 6471563963. The reversal of 6471563897 is 7983651746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6123219001 + 348344896 = 78251^2 + 18664^2 .

It is a cyclic number.

It is not a de Polignac number, because 6471563897 - 2⁸ = 6471563641 is a prime.

It is a super-2 number, since 2×6471563897² = 83762278545907653218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6471565897) 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 as a sum of consecutive naturals, namely, 3235781948 + 3235781949.

It is an arithmetic number, because the mean of its divisors is an integer number (3235781949).

Almost surely, 2^6471563897 is an apocalyptic number.

It is an amenable number.

6471563897 is a deficient number, since it is larger than the sum of its proper divisors (1).

6471563897 is an equidigital number, since it uses as much as digits as its factorization.

6471563897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 56.

The square root of 6471563897 is about 80446.0309586495. The cubic root of 6471563897 is about 1863.5301110736.

The spelling of 6471563897 in words is "six billion, four hundred seventy-one million, five hundred sixty-three thousand, eight hundred ninety-seven".