81018064301 has 2 divisors, whose sum is σ = 81018064302. Its totient is φ = 81018064300.

The previous prime is 81018064271. The next prime is 81018064307. The reversal of 81018064301 is 10346081018.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77967159076 + 3050905225 = 279226^2 + 55235^2 .

It is a cyclic number.

It is not a de Polignac number, because 81018064301 - 2¹⁰ = 81018063277 is a prime.

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 (81018064307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40509032150 + 40509032151.

It is an arithmetic number, because the mean of its divisors is an integer number (40509032151).

Almost surely, 2^81018064301 is an apocalyptic number.

It is an amenable number.

81018064301 is a deficient number, since it is larger than the sum of its proper divisors (1).

81018064301 is an equidigital number, since it uses as much as digits as its factorization.

81018064301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 81018064301 in words is "eighty-one billion, eighteen million, sixty-four thousand, three hundred one".