55111311311191 has 2 divisors, whose sum is σ = 55111311311192. Its totient is φ = 55111311311190.

The previous prime is 55111311311171. The next prime is 55111311311201. The reversal of 55111311311191 is 19111311311155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55111311311191 - 2²⁹ = 55110774440279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55111311311171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27555655655595 + 27555655655596.

It is an arithmetic number, because the mean of its divisors is an integer number (27555655655596).

Almost surely, 2^{55111311311191} is an apocalyptic number.

55111311311191 is a deficient number, since it is larger than the sum of its proper divisors (1).

55111311311191 is an equidigital number, since it uses as much as digits as its factorization.

55111311311191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2025, while the sum is 34.

The spelling of 55111311311191 in words is "fifty-five trillion, one hundred eleven billion, three hundred eleven million, three hundred eleven thousand, one hundred ninety-one".