55555506571 has 2 divisors, whose sum is σ = 55555506572. Its totient is φ = 55555506570.

The previous prime is 55555506569. The next prime is 55555506593. The reversal of 55555506571 is 17560555555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55555506571 - 2¹ = 55555506569 is a prime.

Together with 55555506569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55555506511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777753285 + 27777753286.

It is an arithmetic number, because the mean of its divisors is an integer number (27777753286).

Almost surely, 2^55555506571 is an apocalyptic number.

55555506571 is a deficient number, since it is larger than the sum of its proper divisors (1).

55555506571 is an equidigital number, since it uses as much as digits as its factorization.

55555506571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3281250, while the sum is 49.

The spelling of 55555506571 in words is "fifty-five billion, five hundred fifty-five million, five hundred six thousand, five hundred seventy-one".