55378171647143 has 2 divisors, whose sum is σ = 55378171647144. Its totient is φ = 55378171647142.

The previous prime is 55378171647089. The next prime is 55378171647151. The reversal of 55378171647143 is 34174617187355.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55378171647143 - 2²⁰ = 55378170598567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55378171647443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27689085823571 + 27689085823572.

It is an arithmetic number, because the mean of its divisors is an integer number (27689085823572).

Almost surely, 2^{55378171647143} is an apocalyptic number.

55378171647143 is a deficient number, since it is larger than the sum of its proper divisors (1).

55378171647143 is an equidigital number, since it uses as much as digits as its factorization.

55378171647143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59270400, while the sum is 62.

The spelling of 55378171647143 in words is "fifty-five trillion, three hundred seventy-eight billion, one hundred seventy-one million, six hundred forty-seven thousand, one hundred forty-three".