726133987591 has 2 divisors, whose sum is σ = 726133987592. Its totient is φ = 726133987590.

The previous prime is 726133987547. The next prime is 726133987619. The reversal of 726133987591 is 195789331627.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 726133987591 - 2⁷ = 726133987463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (726133987391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363066993795 + 363066993796.

It is an arithmetic number, because the mean of its divisors is an integer number (363066993796).

Almost surely, 2^726133987591 is an apocalyptic number.

726133987591 is a deficient number, since it is larger than the sum of its proper divisors (1).

726133987591 is an equidigital number, since it uses as much as digits as its factorization.

726133987591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17146080, while the sum is 61.

The spelling of 726133987591 in words is "seven hundred twenty-six billion, one hundred thirty-three million, nine hundred eighty-seven thousand, five hundred ninety-one".