6477656647 has 16 divisors (see below), whose sum is σ = 8108239104. Its totient is φ = 5027400000.

The previous prime is 6477656623. The next prime is 6477656683. The reversal of 6477656647 is 7466567746.

It is not a de Polignac number, because 6477656647 - 2¹⁹ = 6477132359 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6477656591 and 6477656600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6477656147) 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 15 ways as a sum of consecutive naturals, for example, 148254 + ... + 186907.

It is an arithmetic number, because the mean of its divisors is an integer number (506764944).

Almost surely, 2^6477656647 is an apocalyptic number.

6477656647 is a deficient number, since it is larger than the sum of its proper divisors (1630582457).

6477656647 is a wasteful number, since it uses less digits than its factorization.

6477656647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335430.

The product of its digits is 35562240, while the sum is 58.

The square root of 6477656647 is about 80483.8906055119. The cubic root of 6477656647 is about 1864.1147436802.

The spelling of 6477656647 in words is "six billion, four hundred seventy-seven million, six hundred fifty-six thousand, six hundred forty-seven".