823141635557 has 2 divisors, whose sum is σ = 823141635558. Its totient is φ = 823141635556.

The previous prime is 823141635509. The next prime is 823141635559. The reversal of 823141635557 is 755536141328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 706362926116 + 116778709441 = 840454^2 + 341729^2 .

It is a cyclic number.

It is not a de Polignac number, because 823141635557 - 2¹⁶ = 823141570021 is a prime.

Together with 823141635559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (823141635559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411570817778 + 411570817779.

It is an arithmetic number, because the mean of its divisors is an integer number (411570817779).

Almost surely, 2^823141635557 is an apocalyptic number.

It is an amenable number.

823141635557 is a deficient number, since it is larger than the sum of its proper divisors (1).

823141635557 is an equidigital number, since it uses as much as digits as its factorization.

823141635557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024000, while the sum is 50.

The spelling of 823141635557 in words is "eight hundred twenty-three billion, one hundred forty-one million, six hundred thirty-five thousand, five hundred fifty-seven".