55511051111 has 16 divisors (see below), whose sum is σ = 59806771200. Its totient is φ = 51353362368.

The previous prime is 55511051081. The next prime is 55511051131. The reversal of 55511051111 is 11115011555.

It is a cyclic number.

It is not a de Polignac number, because 55511051111 - 2¹⁸ = 55510788967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55511051131) 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, 4960955 + ... + 4972131.

It is an arithmetic number, because the mean of its divisors is an integer number (3737923200).

Almost surely, 2^55511051111 is an apocalyptic number.

55511051111 is a deficient number, since it is larger than the sum of its proper divisors (4295720089).

55511051111 is a wasteful number, since it uses less digits than its factorization.

55511051111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17318.

The product of its (nonzero) digits is 625, while the sum is 26.

Adding to 55511051111 its reverse (11115011555), we get a palindrome (66626062666).

The spelling of 55511051111 in words is "fifty-five billion, five hundred eleven million, fifty-one thousand, one hundred eleven".