523656646223453 has 2 divisors, whose sum is σ = 523656646223454. Its totient is φ = 523656646223452.

The previous prime is 523656646223377. The next prime is 523656646223479. The reversal of 523656646223453 is 354322646656325.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 270651292899289 + 253005353324164 = 16451483^2 + 15906142^2 .

It is a cyclic number.

It is not a de Polignac number, because 523656646223453 - 2³⁸ = 523381768316509 is a prime.

It is a super-2 number, since 2×523656646223453² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (523656646223153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261828323111726 + 261828323111727.

It is an arithmetic number, because the mean of its divisors is an integer number (261828323111727).

Almost surely, 2^{523656646223453} is an apocalyptic number.

It is an amenable number.

523656646223453 is a deficient number, since it is larger than the sum of its proper divisors (1).

523656646223453 is an equidigital number, since it uses as much as digits as its factorization.

523656646223453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872000, while the sum is 62.

The spelling of 523656646223453 in words is "five hundred twenty-three trillion, six hundred fifty-six billion, six hundred forty-six million, two hundred twenty-three thousand, four hundred fifty-three".