55543511111 has 16 divisors (see below), whose sum is σ = 60719245440. Its totient is φ = 50388950880.

The previous prime is 55543511081. The next prime is 55543511159. The reversal of 55543511111 is 11111534555.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55543511111 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 (55543511311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17199845 + ... + 17203073.

It is an arithmetic number, because the mean of its divisors is an integer number (3794952840).

Almost surely, 2^55543511111 is an apocalyptic number.

55543511111 is a deficient number, since it is larger than the sum of its proper divisors (5175734329).

55543511111 is a wasteful number, since it uses less digits than its factorization.

55543511111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6014.

The product of its digits is 7500, while the sum is 32.

The spelling of 55543511111 in words is "fifty-five billion, five hundred forty-three million, five hundred eleven thousand, one hundred eleven".