726268505 has 16 divisors (see below), whose sum is σ = 878727744. Its totient is φ = 576227520.

The previous prime is 726268481. The next prime is 726268519. The reversal of 726268505 is 505862627.

It is not a de Polignac number, because 726268505 - 2¹⁸ = 726006361 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 766442 + ... + 767388.

It is an arithmetic number, because the mean of its divisors is an integer number (54920484).

Almost surely, 2^726268505 is an apocalyptic number.

It is an amenable number.

726268505 is a deficient number, since it is larger than the sum of its proper divisors (152459239).

726268505 is a wasteful number, since it uses less digits than its factorization.

726268505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 726268505 is about 26949.3692876104. The cubic root of 726268505 is about 898.8745211228.

The spelling of 726268505 in words is "seven hundred twenty-six million, two hundred sixty-eight thousand, five hundred five".