523606254834781 has 2 divisors, whose sum is σ = 523606254834782. Its totient is φ = 523606254834780.

The previous prime is 523606254834737. The next prime is 523606254834797. The reversal of 523606254834781 is 187438452606325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 511064422146756 + 12541832688025 = 22606734^2 + 3541445^2 .

It is a cyclic number.

It is not a de Polignac number, because 523606254834781 - 2⁹ = 523606254834269 is a prime.

It is a super-2 number, since 2×523606254834781² (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 (523606254894781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261803127417390 + 261803127417391.

It is an arithmetic number, because the mean of its divisors is an integer number (261803127417391).

Almost surely, 2^{523606254834781} is an apocalyptic number.

It is an amenable number.

523606254834781 is a deficient number, since it is larger than the sum of its proper divisors (1).

523606254834781 is an equidigital number, since it uses as much as digits as its factorization.

523606254834781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 232243200, while the sum is 64.

The spelling of 523606254834781 in words is "five hundred twenty-three trillion, six hundred six billion, two hundred fifty-four million, eight hundred thirty-four thousand, seven hundred eighty-one".