55117681211 has 2 divisors, whose sum is σ = 55117681212. Its totient is φ = 55117681210.

The previous prime is 55117681139. The next prime is 55117681237. The reversal of 55117681211 is 11218671155.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55117681211 - 2¹⁰ = 55117680187 is a prime.

It is not a weakly prime, because it can be changed into another prime (55117681261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27558840605 + 27558840606.

It is an arithmetic number, because the mean of its divisors is an integer number (27558840606).

Almost surely, 2^55117681211 is an apocalyptic number.

55117681211 is a deficient number, since it is larger than the sum of its proper divisors (1).

55117681211 is an equidigital number, since it uses as much as digits as its factorization.

55117681211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 38.

The spelling of 55117681211 in words is "fifty-five billion, one hundred seventeen million, six hundred eighty-one thousand, two hundred eleven".