6638055543 has 96 divisors (see below), whose sum is σ = 11982297600. Its totient is φ = 3591858816.

The previous prime is 6638055497. The next prime is 6638055581. The reversal of 6638055543 is 3455508366.

6638055543 is a `hidden beast` number, since 6 + 638 + 0 + 5 + 5 + 5 + 4 + 3 = 666.

It is not a de Polignac number, because 6638055543 - 2⁹ = 6638055031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6638055143) 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 in 95 ways as a sum of consecutive naturals, for example, 2613168 + ... + 2615706.

It is an arithmetic number, because the mean of its divisors is an integer number (124815600).

Almost surely, 2^6638055543 is an apocalyptic number.

6638055543 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

6638055543 is a deficient number, since it is larger than the sum of its proper divisors (5344242057).

6638055543 is a wasteful number, since it uses less digits than its factorization.

6638055543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643 (or 2631 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The square root of 6638055543 is about 81474.2630712300. The cubic root of 6638055543 is about 1879.3757870892.

The spelling of 6638055543 in words is "six billion, six hundred thirty-eight million, fifty-five thousand, five hundred forty-three".