80556123191 has 2 divisors, whose sum is σ = 80556123192. Its totient is φ = 80556123190.

The previous prime is 80556123181. The next prime is 80556123223. The reversal of 80556123191 is 19132165508.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80556123191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80556123181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40278061595 + 40278061596.

It is an arithmetic number, because the mean of its divisors is an integer number (40278061596).

Almost surely, 2^80556123191 is an apocalyptic number.

80556123191 is a deficient number, since it is larger than the sum of its proper divisors (1).

80556123191 is an equidigital number, since it uses as much as digits as its factorization.

80556123191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 41.

Adding to 80556123191 its reverse (19132165508), we get a palindrome (99688288699).

The spelling of 80556123191 in words is "eighty billion, five hundred fifty-six million, one hundred twenty-three thousand, one hundred ninety-one".