726404346450191 has 2 divisors, whose sum is σ = 726404346450192. Its totient is φ = 726404346450190.

The previous prime is 726404346450179. The next prime is 726404346450229. The reversal of 726404346450191 is 191054643404627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 726404346450191 - 2⁶ = 726404346450127 is a prime.

It is a super-2 number, since 2×726404346450191² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726404346450091) 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, 363202173225095 + 363202173225096.

It is an arithmetic number, because the mean of its divisors is an integer number (363202173225096).

Almost surely, 2^{726404346450191} is an apocalyptic number.

726404346450191 is a deficient number, since it is larger than the sum of its proper divisors (1).

726404346450191 is an equidigital number, since it uses as much as digits as its factorization.

726404346450191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17418240, while the sum is 56.

The spelling of 726404346450191 in words is "seven hundred twenty-six trillion, four hundred four billion, three hundred forty-six million, four hundred fifty thousand, one hundred ninety-one".