55555558611111 has 32 divisors (see below), whose sum is σ = 88636309845440. Its totient is φ = 34187781196800.

The previous prime is 55555558611109. The next prime is 55555558611181. The reversal of 55555558611111 is 11111685555555.

It is a happy number.

55555558611111 is a `hidden beast` number, since 5 + 5 + 5 + 5 + 5 + 5 + 5 + 8 + 611 + 1 + 11 = 666.

It is not a de Polignac number, because 55555558611111 - 2¹ = 55555558611109 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 (55555558611181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53653851 + ... + 54679491.

It is an arithmetic number, because the mean of its divisors is an integer number (2769884682670).

Almost surely, 2^{55555558611111} is an apocalyptic number.

55555558611111 is a deficient number, since it is larger than the sum of its proper divisors (33080751234329).

55555558611111 is a wasteful number, since it uses less digits than its factorization.

55555558611111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179984 (or 1179978 counting only the distinct ones).

The product of its digits is 3750000, while the sum is 54.

The spelling of 55555558611111 in words is "fifty-five trillion, five hundred fifty-five billion, five hundred fifty-eight million, six hundred eleven thousand, one hundred eleven".