55663802191 has 2 divisors, whose sum is σ = 55663802192. Its totient is φ = 55663802190.

The previous prime is 55663802149. The next prime is 55663802231. The reversal of 55663802191 is 19120836655.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55663802191 - 2⁷ = 55663802063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55663892191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27831901095 + 27831901096.

It is an arithmetic number, because the mean of its divisors is an integer number (27831901096).

Almost surely, 2^55663802191 is an apocalyptic number.

55663802191 is a deficient number, since it is larger than the sum of its proper divisors (1).

55663802191 is an equidigital number, since it uses as much as digits as its factorization.

55663802191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 55663802191 in words is "fifty-five billion, six hundred sixty-three million, eight hundred two thousand, one hundred ninety-one".