726364165 has 4 divisors (see below), whose sum is σ = 871637004. Its totient is φ = 581091328.

The previous prime is 726364153. The next prime is 726364207. The reversal of 726364165 is 561463627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 491109921 + 235254244 = 22161^2 + 15338^2 .

It is a cyclic number.

It is not a de Polignac number, because 726364165 - 2⁹ = 726363653 is a prime.

It is a super-2 number, since 2×726364165² = 1055209800392294450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72636412 + ... + 72636421.

It is an arithmetic number, because the mean of its divisors is an integer number (217909251).

Almost surely, 2^726364165 is an apocalyptic number.

It is an amenable number.

726364165 is a deficient number, since it is larger than the sum of its proper divisors (145272839).

726364165 is a wasteful number, since it uses less digits than its factorization.

726364165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145272838.

The product of its digits is 181440, while the sum is 40.

The square root of 726364165 is about 26951.1440387973. The cubic root of 726364165 is about 898.9139842879.

The spelling of 726364165 in words is "seven hundred twenty-six million, three hundred sixty-four thousand, one hundred sixty-five".