723668225009 has 16 divisors (see below), whose sum is σ = 743599256400. Its totient is φ = 703993006080.

The previous prime is 723668225003. The next prime is 723668225029. The reversal of 723668225009 is 900522866327.

It can be written as a sum of positive squares in 8 ways, for example, as 271203475984 + 452464749025 = 520772^2 + 672655^2 .

It is a cyclic number.

It is not a de Polignac number, because 723668225009 - 2²⁴ = 723651447793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (723668225003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3120917 + ... + 3344765.

It is an arithmetic number, because the mean of its divisors is an integer number (46474953525).

Almost surely, 2^723668225009 is an apocalyptic number.

It is an amenable number.

723668225009 is a deficient number, since it is larger than the sum of its proper divisors (19931031391).

723668225009 is a wasteful number, since it uses less digits than its factorization.

723668225009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224420.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 723668225009 in words is "seven hundred twenty-three billion, six hundred sixty-eight million, two hundred twenty-five thousand, nine".