306813066881 has 2 divisors, whose sum is σ = 306813066882. Its totient is φ = 306813066880.

The previous prime is 306813066823. The next prime is 306813066913. The reversal of 306813066881 is 188660318603.

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., 207647907856 + 99165159025 = 455684^2 + 314905^2 .

It is an emirp because it is prime and its reverse (188660318603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 306813066881 - 2¹⁸ = 306812804737 is a prime.

It is a super-2 number, since 2×306813066881² (a number of 24 digits) contains 22 as substring.

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 (306813066821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153406533440 + 153406533441.

It is an arithmetic number, because the mean of its divisors is an integer number (153406533441).

Almost surely, 2^306813066881 is an apocalyptic number.

It is an amenable number.

306813066881 is a deficient number, since it is larger than the sum of its proper divisors (1).

306813066881 is an equidigital number, since it uses as much as digits as its factorization.

306813066881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 306813066881 in words is "three hundred six billion, eight hundred thirteen million, sixty-six thousand, eight hundred eighty-one".