555778811111 has 16 divisors (see below), whose sum is σ = 568958584320. Its totient is φ = 542738208480.

The previous prime is 555778811069. The next prime is 555778811123. The reversal of 555778811111 is 111118877555.

It is a de Polignac number, because none of the positive numbers 2^k-555778811111 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 555778811111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555778811141) 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, 8514380 + ... + 8579406.

It is an arithmetic number, because the mean of its divisors is an integer number (35559911520).

Almost surely, 2^555778811111 is an apocalyptic number.

555778811111 is a deficient number, since it is larger than the sum of its proper divisors (13179773209).

555778811111 is a wasteful number, since it uses less digits than its factorization.

555778811111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66094.

The product of its digits is 392000, while the sum is 50.

It can be divided in two parts, 55577 and 8811111, that added together give a palindrome (8866688).

The spelling of 555778811111 in words is "five hundred fifty-five billion, seven hundred seventy-eight million, eight hundred eleven thousand, one hundred eleven".