726196406591 has 2 divisors, whose sum is σ = 726196406592. Its totient is φ = 726196406590.

The previous prime is 726196406581. The next prime is 726196406657. The reversal of 726196406591 is 195604691627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 726196406591 - 2³⁴ = 709016537407 is a prime.

It is a super-2 number, since 2×726196406591² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726196406501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363098203295 + 363098203296.

It is an arithmetic number, because the mean of its divisors is an integer number (363098203296).

Almost surely, 2^726196406591 is an apocalyptic number.

726196406591 is a deficient number, since it is larger than the sum of its proper divisors (1).

726196406591 is an equidigital number, since it uses as much as digits as its factorization.

726196406591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 726196406591 in words is "seven hundred twenty-six billion, one hundred ninety-six million, four hundred six thousand, five hundred ninety-one".