523376703556561 has 2 divisors, whose sum is σ = 523376703556562. Its totient is φ = 523376703556560.

The previous prime is 523376703556489. The next prime is 523376703556571. The reversal of 523376703556561 is 165655307673325.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 400910277289536 + 122466426267025 = 20022744^2 + 11066455^2 .

It is a cyclic number.

It is not a de Polignac number, because 523376703556561 - 2¹¹ = 523376703554513 is a prime.

It is a super-2 number, since 2×523376703556561² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 523376703556493 and 523376703556502.

It is not a weakly prime, because it can be changed into another prime (523376703556571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261688351778280 + 261688351778281.

It is an arithmetic number, because the mean of its divisors is an integer number (261688351778281).

Almost surely, 2^{523376703556561} is an apocalyptic number.

It is an amenable number.

523376703556561 is a deficient number, since it is larger than the sum of its proper divisors (1).

523376703556561 is an equidigital number, since it uses as much as digits as its factorization.

523376703556561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 357210000, while the sum is 64.

The spelling of 523376703556561 in words is "five hundred twenty-three trillion, three hundred seventy-six billion, seven hundred three million, five hundred fifty-six thousand, five hundred sixty-one".