55555556111111 has 16 divisors (see below), whose sum is σ = 63542927040000. Its totient is φ = 47580912419040.

The previous prime is 55555556111047. The next prime is 55555556111131. The reversal of 55555556111111 is 11111165555555.

55555556111111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55555556111111 - 2⁶ = 55555556111047 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 (55555556111131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57857141 + ... + 58809521.

It is an arithmetic number, because the mean of its divisors is an integer number (3971432940000).

Almost surely, 2^{55555556111111} is an apocalyptic number.

55555556111111 is a deficient number, since it is larger than the sum of its proper divisors (7987370928889).

55555556111111 is a wasteful number, since it uses less digits than its factorization.

55555556111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959054.

The product of its digits is 468750, while the sum is 47.

It can be divided in two parts, 55555556 and 111111, that multiplied together give a palindrome (6172833382716).

The spelling of 55555556111111 in words is "fifty-five trillion, five hundred fifty-five billion, five hundred fifty-six million, one hundred eleven thousand, one hundred eleven".