6543257684 has 12 divisors (see below), whose sum is σ = 11469757908. Its totient is φ = 3266184000.

The previous prime is 6543257681. The next prime is 6543257717. The reversal of 6543257684 is 4867523456.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3689347600 + 2853910084 = 60740^2 + 53422^2 .

It is a super-2 number, since 2×6543257684² = 85628442238450087712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6543257681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1358507 + ... + 1363314.

It is an arithmetic number, because the mean of its divisors is an integer number (955813159).

Almost surely, 2^6543257684 is an apocalyptic number.

It is an amenable number.

6543257684 is a deficient number, since it is larger than the sum of its proper divisors (4926500224).

6543257684 is a wasteful number, since it uses less digits than its factorization.

6543257684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722426 (or 2722424 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 50.

The square root of 6543257684 is about 80890.4053890200. The cubic root of 6543257684 is about 1870.3864228548.

The spelling of 6543257684 in words is "six billion, five hundred forty-three million, two hundred fifty-seven thousand, six hundred eighty-four".