918191910047 has 2 divisors, whose sum is σ = 918191910048. Its totient is φ = 918191910046.

The previous prime is 918191909969. The next prime is 918191910091. The reversal of 918191910047 is 740019191819.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 918191910047 - 2¹⁸ = 918191647903 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 918191909977 and 918191910004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918191910847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459095955023 + 459095955024.

It is an arithmetic number, because the mean of its divisors is an integer number (459095955024).

Almost surely, 2^918191910047 is an apocalyptic number.

918191910047 is a deficient number, since it is larger than the sum of its proper divisors (1).

918191910047 is an equidigital number, since it uses as much as digits as its factorization.

918191910047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 50.

The spelling of 918191910047 in words is "nine hundred eighteen billion, one hundred ninety-one million, nine hundred ten thousand, forty-seven".