81589764301 has 2 divisors, whose sum is σ = 81589764302. Its totient is φ = 81589764300.

The previous prime is 81589764287. The next prime is 81589764307. The reversal of 81589764301 is 10346798518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49091049225 + 32498715076 = 221565^2 + 180274^2 .

It is a cyclic number.

It is not a de Polignac number, because 81589764301 - 2¹³ = 81589756109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81589764307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40794882150 + 40794882151.

It is an arithmetic number, because the mean of its divisors is an integer number (40794882151).

Almost surely, 2^81589764301 is an apocalyptic number.

It is an amenable number.

81589764301 is a deficient number, since it is larger than the sum of its proper divisors (1).

81589764301 is an equidigital number, since it uses as much as digits as its factorization.

81589764301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 81589764301 in words is "eighty-one billion, five hundred eighty-nine million, seven hundred sixty-four thousand, three hundred one".