55571522177 has 2 divisors, whose sum is σ = 55571522178. Its totient is φ = 55571522176.

The previous prime is 55571522159. The next prime is 55571522179. The reversal of 55571522177 is 77122517555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48837022081 + 6734500096 = 220991^2 + 82064^2 .

It is a cyclic number.

It is not a de Polignac number, because 55571522177 - 2²² = 55567327873 is a prime.

Together with 55571522179, 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 (55571522179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27785761088 + 27785761089.

It is an arithmetic number, because the mean of its divisors is an integer number (27785761089).

Almost surely, 2^55571522177 is an apocalyptic number.

It is an amenable number.

55571522177 is a deficient number, since it is larger than the sum of its proper divisors (1).

55571522177 is an equidigital number, since it uses as much as digits as its factorization.

55571522177 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857500, while the sum is 47.

The spelling of 55571522177 in words is "fifty-five billion, five hundred seventy-one million, five hundred twenty-two thousand, one hundred seventy-seven".