523201554635813 has 2 divisors, whose sum is σ = 523201554635814. Its totient is φ = 523201554635812.

The previous prime is 523201554635797. The next prime is 523201554635887. The reversal of 523201554635813 is 318536455102325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 413694161917729 + 109507392718084 = 20339473^2 + 10464578^2 .

It is a cyclic number.

It is not a de Polignac number, because 523201554635813 - 2⁴ = 523201554635797 is a prime.

It is a super-2 number, since 2×523201554635813² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523201554635113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261600777317906 + 261600777317907.

It is an arithmetic number, because the mean of its divisors is an integer number (261600777317907).

Almost surely, 2^{523201554635813} is an apocalyptic number.

It is an amenable number.

523201554635813 is a deficient number, since it is larger than the sum of its proper divisors (1).

523201554635813 is an equidigital number, since it uses as much as digits as its factorization.

523201554635813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960000, while the sum is 53.

The spelling of 523201554635813 in words is "five hundred twenty-three trillion, two hundred one billion, five hundred fifty-four million, six hundred thirty-five thousand, eight hundred thirteen".