6555515543 has 4 divisors (see below), whose sum is σ = 6715406208. Its totient is φ = 6395624880.

The previous prime is 6555515509. The next prime is 6555515557. The reversal of 6555515543 is 3455155556.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6555515543 - 2⁶ = 6555515479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6555515494 and 6555515503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6555515563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79945271 + ... + 79945352.

It is an arithmetic number, because the mean of its divisors is an integer number (1678851552).

Almost surely, 2^6555515543 is an apocalyptic number.

6555515543 is a deficient number, since it is larger than the sum of its proper divisors (159890665).

6555515543 is a wasteful number, since it uses less digits than its factorization.

6555515543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159890664.

The product of its digits is 1125000, while the sum is 44.

The square root of 6555515543 is about 80966.1382492706. The cubic root of 6555515543 is about 1871.5536615737.

The spelling of 6555515543 in words is "six billion, five hundred fifty-five million, five hundred fifteen thousand, five hundred forty-three".