556006005551 has 4 divisors (see below), whose sum is σ = 556376925000. Its totient is φ = 555635086104.

The previous prime is 556006005547. The next prime is 556006005553. The reversal of 556006005551 is 155500600655.

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 556006005551 - 2² = 556006005547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556006005553) 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, 185457476 + ... + 185460473.

It is an arithmetic number, because the mean of its divisors is an integer number (139094231250).

Almost surely, 2^556006005551 is an apocalyptic number.

556006005551 is a deficient number, since it is larger than the sum of its proper divisors (370919449).

556006005551 is a wasteful number, since it uses less digits than its factorization.

556006005551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370919448.

The product of its (nonzero) digits is 112500, while the sum is 38.

The spelling of 556006005551 in words is "five hundred fifty-six billion, six million, five thousand, five hundred fifty-one".