305212163409 has 12 divisors (see below), whose sum is σ = 440866809396. Its totient is φ = 203472562272.

The previous prime is 305212163383. The next prime is 305212163437. The reversal of 305212163409 is 904361212503.

305212163409 is a `hidden beast` number, since 3 + 0 + 5 + 2 + 12 + 1 + 634 + 0 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 149534569809 + 155677593600 = 386697^2 + 394560^2 .

It is not a de Polignac number, because 305212163409 - 2¹² = 305212159313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (305212163209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1469287 + ... + 1664099.

It is an arithmetic number, because the mean of its divisors is an integer number (36738900783).

Almost surely, 2^305212163409 is an apocalyptic number.

It is an amenable number.

305212163409 is a deficient number, since it is larger than the sum of its proper divisors (135654645987).

305212163409 is a wasteful number, since it uses less digits than its factorization.

305212163409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368896 (or 368893 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 305212163409 in words is "three hundred five billion, two hundred twelve million, one hundred sixty-three thousand, four hundred nine".