55555555556 has 12 divisors (see below), whose sum is σ = 97280555568. Its totient is φ = 27761111112.

The previous prime is 55555555543. The next prime is 55555555619. The reversal of 55555555556 is 65555555555.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 10.

It is an unprimeable number.

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, 4159166 + ... + 4172501.

It is an arithmetic number, because the mean of its divisors is an integer number (8106712964).

Almost surely, 2^55555555556 is an apocalyptic number.

It is an amenable number.

55555555556 is a deficient number, since it is larger than the sum of its proper divisors (41725000012).

55555555556 is a wasteful number, since it uses less digits than its factorization.

55555555556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8333338 (or 8333336 counting only the distinct ones).

The product of its digits is 58593750, while the sum is 56.

Subtracting 55555555556 from its reverse (65555555555), we obtain a palindrome (9999999999).

The spelling of 55555555556 in words is "fifty-five billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-six".