523304666405 has 16 divisors (see below), whose sum is σ = 631294527600. Its totient is φ = 416425400832.

The previous prime is 523304666351. The next prime is 523304666407. The reversal of 523304666405 is 504666403325.

It is a Cunningham number, because it is equal to 723398²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 188388985444 + 334915680961 = 434038^2 + 578719^2 .

It is a cyclic number.

It is not a de Polignac number, because 523304666405 - 2¹⁴ = 523304650021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523304666407) 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, 4522127 + ... + 4636403.

It is an arithmetic number, because the mean of its divisors is an integer number (39455907975).

Almost surely, 2^523304666405 is an apocalyptic number.

It is an amenable number.

523304666405 is a deficient number, since it is larger than the sum of its proper divisors (107989861195).

523304666405 is a wasteful number, since it uses less digits than its factorization.

523304666405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119128.

The product of its (nonzero) digits is 1555200, while the sum is 44.

The spelling of 523304666405 in words is "five hundred twenty-three billion, three hundred four million, six hundred sixty-six thousand, four hundred five".