845726011321 has 2 divisors, whose sum is σ = 845726011322. Its totient is φ = 845726011320.

The previous prime is 845726011307. The next prime is 845726011367. The reversal of 845726011321 is 123110627548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 737771052096 + 107954959225 = 858936^2 + 328565^2 .

It is a cyclic number.

It is not a de Polignac number, because 845726011321 - 2¹⁷ = 845725880249 is a prime.

It is not a weakly prime, because it can be changed into another prime (845726011621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422863005660 + 422863005661.

It is an arithmetic number, because the mean of its divisors is an integer number (422863005661).

Almost surely, 2^845726011321 is an apocalyptic number.

It is an amenable number.

845726011321 is a deficient number, since it is larger than the sum of its proper divisors (1).

845726011321 is an equidigital number, since it uses as much as digits as its factorization.

845726011321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 40.

Adding to 845726011321 its reverse (123110627548), we get a palindrome (968836638869).

The spelling of 845726011321 in words is "eight hundred forty-five billion, seven hundred twenty-six million, eleven thousand, three hundred twenty-one".