726721893663 has 8 divisors (see below), whose sum is σ = 968966800128. Its totient is φ = 484479124824.

The previous prime is 726721893641. The next prime is 726721893673. The reversal of 726721893663 is 366398127627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 726721893663 - 2⁵ = 726721893631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 726721893597 and 726721893606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726721893673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 607306 + ... + 1349912.

It is an arithmetic number, because the mean of its divisors is an integer number (121120850016).

Almost surely, 2^726721893663 is an apocalyptic number.

726721893663 is a deficient number, since it is larger than the sum of its proper divisors (242244906465).

726721893663 is a wasteful number, since it uses less digits than its factorization.

726721893663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068813.

The product of its digits is 27433728, while the sum is 60.

The spelling of 726721893663 in words is "seven hundred twenty-six billion, seven hundred twenty-one million, eight hundred ninety-three thousand, six hundred sixty-three".