5515556543 has 4 divisors (see below), whose sum is σ = 6303493200. Its totient is φ = 4727619888.

The previous prime is 5515556539. The next prime is 5515556567. The reversal of 5515556543 is 3456555155.

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 5515556543 - 2² = 5515556539 is a prime.

It is a super-2 number, since 2×5515556543² = 60842727958060221698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5515556494 and 5515556503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5515556503) 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 3 ways as a sum of consecutive naturals, for example, 393968318 + ... + 393968331.

It is an arithmetic number, because the mean of its divisors is an integer number (1575873300).

Almost surely, 2^5515556543 is an apocalyptic number.

5515556543 is a deficient number, since it is larger than the sum of its proper divisors (787936657).

5515556543 is an equidigital number, since it uses as much as digits as its factorization.

5515556543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787936656.

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

The square root of 5515556543 is about 74266.7930033336. The cubic root of 5515556543 is about 1766.8368439407.

The spelling of 5515556543 in words is "five billion, five hundred fifteen million, five hundred fifty-six thousand, five hundred forty-three".