306661612131 has 24 divisors (see below), whose sum is σ = 532878993920. Its totient is φ = 166012300656.

The previous prime is 306661612079. The next prime is 306661612141. The reversal of 306661612131 is 131216166603.

It is not a de Polignac number, because 306661612131 - 2¹³ = 306661603939 is a prime.

It is a super-2 number, since 2×306661612131² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (306661612141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128094715 + ... + 128097108.

Almost surely, 2^306661612131 is an apocalyptic number.

306661612131 is a deficient number, since it is larger than the sum of its proper divisors (226217381789).

306661612131 is a wasteful number, since it uses less digits than its factorization.

306661612131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256191855 (or 256191852 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

Adding to 306661612131 its reverse (131216166603), we get a palindrome (437877778734).

The spelling of 306661612131 in words is "three hundred six billion, six hundred sixty-one million, six hundred twelve thousand, one hundred thirty-one".