55505500571 has 2 divisors, whose sum is σ = 55505500572. Its totient is φ = 55505500570.

The previous prime is 55505500553. The next prime is 55505500573. The reversal of 55505500571 is 17500550555.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55505500571 is a prime.

Together with 55505500573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55505500573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27752750285 + 27752750286.

It is an arithmetic number, because the mean of its divisors is an integer number (27752750286).

Almost surely, 2^55505500571 is an apocalyptic number.

55505500571 is a deficient number, since it is larger than the sum of its proper divisors (1).

55505500571 is an equidigital number, since it uses as much as digits as its factorization.

55505500571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109375, while the sum is 38.

The spelling of 55505500571 in words is "fifty-five billion, five hundred five million, five hundred thousand, five hundred seventy-one".