726414537581 has 2 divisors, whose sum is σ = 726414537582. Its totient is φ = 726414537580.

The previous prime is 726414537559. The next prime is 726414537637. The reversal of 726414537581 is 185735414627.

726414537581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 544717802500 + 181696735081 = 738050^2 + 426259^2 .

It is a cyclic number.

It is not a de Polignac number, because 726414537581 - 2¹⁰ = 726414536557 is a prime.

It is a super-2 number, since 2×726414537581² (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 (726414537551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 363207268790 + 363207268791.

It is an arithmetic number, because the mean of its divisors is an integer number (363207268791).

Almost surely, 2^726414537581 is an apocalyptic number.

It is an amenable number.

726414537581 is a deficient number, since it is larger than the sum of its proper divisors (1).

726414537581 is an equidigital number, since it uses as much as digits as its factorization.

726414537581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5644800, while the sum is 53.

The spelling of 726414537581 in words is "seven hundred twenty-six billion, four hundred fourteen million, five hundred thirty-seven thousand, five hundred eighty-one".