55621182191 has 2 divisors, whose sum is σ = 55621182192. Its totient is φ = 55621182190.

The previous prime is 55621182137. The next prime is 55621182263. The reversal of 55621182191 is 19128112655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55621182191 - 2²² = 55616987887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55621182121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27810591095 + 27810591096.

It is an arithmetic number, because the mean of its divisors is an integer number (27810591096).

Almost surely, 2^55621182191 is an apocalyptic number.

55621182191 is a deficient number, since it is larger than the sum of its proper divisors (1).

55621182191 is an equidigital number, since it uses as much as digits as its factorization.

55621182191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 41.

The spelling of 55621182191 in words is "fifty-five billion, six hundred twenty-one million, one hundred eighty-two thousand, one hundred ninety-one".