55889400191 has 2 divisors, whose sum is σ = 55889400192. Its totient is φ = 55889400190.

The previous prime is 55889400181. The next prime is 55889400211. The reversal of 55889400191 is 19100498855.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55889400191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55889400181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27944700095 + 27944700096.

It is an arithmetic number, because the mean of its divisors is an integer number (27944700096).

Almost surely, 2^55889400191 is an apocalyptic number.

55889400191 is a deficient number, since it is larger than the sum of its proper divisors (1).

55889400191 is an equidigital number, since it uses as much as digits as its factorization.

55889400191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 50.

The spelling of 55889400191 in words is "fifty-five billion, eight hundred eighty-nine million, four hundred thousand, one hundred ninety-one".