726989853769 has 9 divisors (see below), whose sum is σ = 728576654701. Its totient is φ = 725406506860.

The previous prime is 726989853761. The next prime is 726989853781. The reversal of 726989853769 is 967358989627.

The square root of 726989853769 is 852637.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 726989853769 - 2³ = 726989853761 is a prime.

It is a super-2 number, since 2×726989853769² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (726989853761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 705130284 + ... + 705131314.

Almost surely, 2^726989853769 is an apocalyptic number.

726989853769 is the 852637-th square number.

726989853769 is the 426319-th centered octagonal number.

It is an amenable number.

726989853769 is a deficient number, since it is larger than the sum of its proper divisors (1586800932).

726989853769 is an frugal number, since it uses more digits than its factorization.

726989853769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3716 (or 1858 counting only the distinct ones).

The product of its digits is 2469035520, while the sum is 79.

The spelling of 726989853769 in words is "seven hundred twenty-six billion, nine hundred eighty-nine million, eight hundred fifty-three thousand, seven hundred sixty-nine".