55555111112 has 36 divisors (see below), whose sum is σ = 105003743355. Its totient is φ = 27555889776.

The previous prime is 55555111109. The next prime is 55555111169. The reversal of 55555111112 is 21111155555.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 27777555556 + 27777555556 = 166666^2 + 166666^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=166666.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 111332639 + ... + 111333137.

Almost surely, 2^55555111112 is an apocalyptic number.

It is an amenable number.

55555111112 is a deficient number, since it is larger than the sum of its proper divisors (49448632243).

55555111112 is an frugal number, since it uses more digits than its factorization.

55555111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338 (or 668 counting only the distinct ones).

The product of its digits is 6250, while the sum is 32.

Multiplying 55555111112 by its sum of digits (32), we get a square (1777763555584 = 1333328²).

Adding to 55555111112 its reverse (21111155555), we get a palindrome (76666266667).

The spelling of 55555111112 in words is "fifty-five billion, five hundred fifty-five million, one hundred eleven thousand, one hundred twelve".