726785165 has 12 divisors (see below), whose sum is σ = 911713404. Its totient is φ = 556146624.

The previous prime is 726785159. The next prime is 726785167. The reversal of 726785165 is 561587627.

It can be written as a sum of positive squares in 2 ways, for example, as 178569769 + 548215396 = 13363^2 + 23414^2 .

It is not a de Polignac number, because 726785165 - 2⁸ = 726784909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726785167) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134744 + ... + 140033.

It is an arithmetic number, because the mean of its divisors is an integer number (75976117).

Almost surely, 2^726785165 is an apocalyptic number.

It is an amenable number.

726785165 is a deficient number, since it is larger than the sum of its proper divisors (184928239).

726785165 is a wasteful number, since it uses less digits than its factorization.

726785165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274828 (or 274805 counting only the distinct ones).

The product of its digits is 705600, while the sum is 47.

The square root of 726785165 is about 26958.9533365077. The cubic root of 726785165 is about 899.0876206511.

The spelling of 726785165 in words is "seven hundred twenty-six million, seven hundred eighty-five thousand, one hundred sixty-five".