306106381985 has 8 divisors (see below), whose sum is σ = 367423017000. Its totient is φ = 244821533184.

The previous prime is 306106381981. The next prime is 306106382011. The reversal of 306106381985 is 589183601603.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 66214097041 + 239892284944 = 257321^2 + 489788^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 306106381985 - 2² = 306106381981 is a prime.

It is a super-2 number, since 2×306106381985² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (306106381981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7925360 + ... + 7963889.

It is an arithmetic number, because the mean of its divisors is an integer number (45927877125).

Almost surely, 2^306106381985 is an apocalyptic number.

It is an amenable number.

306106381985 is a deficient number, since it is larger than the sum of its proper divisors (61316635015).

306106381985 is a wasteful number, since it uses less digits than its factorization.

306106381985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15893107.

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 306106381985 in words is "three hundred six billion, one hundred six million, three hundred eighty-one thousand, nine hundred eighty-five".