306117207681 has 12 divisors (see below), whose sum is σ = 411984162576. Its totient is φ = 202164319360.

The previous prime is 306117207661. The next prime is 306117207787. The reversal of 306117207681 is 186702711603.

It is not a de Polignac number, because 306117207681 - 2¹³ = 306117199489 is a prime.

It is a super-2 number, since 2×306117207681² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (306117207661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9897361 + ... + 9928241.

It is an arithmetic number, because the mean of its divisors is an integer number (34332013548).

Almost surely, 2^306117207681 is an apocalyptic number.

It is an amenable number.

306117207681 is a deficient number, since it is larger than the sum of its proper divisors (105866954895).

306117207681 is an frugal number, since it uses more digits than its factorization.

306117207681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61872 (or 30991 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The spelling of 306117207681 in words is "three hundred six billion, one hundred seventeen million, two hundred seven thousand, six hundred eighty-one".