55555555555556 has 24 divisors (see below), whose sum is σ = 111157776977856. Its totient is φ = 23799523980960.

The previous prime is 55555555555541. The next prime is 55555555555573. The reversal of 55555555555556 is 65555555555555.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 55555555555556.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416591666 + ... + 416725001.

It is an arithmetic number, because the mean of its divisors is an integer number (4631574040744).

Almost surely, 2^{55555555555556} is an apocalyptic number.

It is an amenable number.

55555555555556 is an abundant number, since it is smaller than the sum of its proper divisors (55602221422300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55555555555556 is a wasteful number, since it uses less digits than its factorization.

55555555555556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833319059 (or 833319057 counting only the distinct ones).

The product of its digits is 7324218750, while the sum is 71.

Subtracting 55555555555556 from its reverse (65555555555555), we obtain a palindrome (9999999999999).

It can be divided in two parts, 5555555 and 5555556, that added together give a palindrome (11111111).

The spelling of 55555555555556 in words is "fifty-five trillion, five hundred fifty-five billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred fifty-six".