428164217238041 has 2 divisors, whose sum is σ = 428164217238042. Its totient is φ = 428164217238040.

The previous prime is 428164217238029. The next prime is 428164217238049. The reversal of 428164217238041 is 140832712461824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 306796979015641 + 121367238222400 = 17515621^2 + 11016680^2 .

It is a cyclic number.

It is not a de Polignac number, because 428164217238041 - 2¹⁰ = 428164217237017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (428164217238049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214082108619020 + 214082108619021.

It is an arithmetic number, because the mean of its divisors is an integer number (214082108619021).

Almost surely, 2^{428164217238041} is an apocalyptic number.

It is an amenable number.

428164217238041 is a deficient number, since it is larger than the sum of its proper divisors (1).

428164217238041 is an equidigital number, since it uses as much as digits as its factorization.

428164217238041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4128768, while the sum is 53.

Adding to 428164217238041 its reverse (140832712461824), we get a palindrome (568996929699865).

The spelling of 428164217238041 in words is "four hundred twenty-eight trillion, one hundred sixty-four billion, two hundred seventeen million, two hundred thirty-eight thousand, forty-one".