305164056321 has 12 divisors (see below), whose sum is σ = 440800289748. Its totient is φ = 203439120864.

The previous prime is 305164056313. The next prime is 305164056341. The reversal of 305164056321 is 123650461503.

305164056321 is a `hidden beast` number, since 3 + 0 + 5 + 1 + 640 + 5 + 6 + 3 + 2 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 161632945296 + 143531111025 = 402036^2 + 378855^2 .

It is not a de Polignac number, because 305164056321 - 2³ = 305164056313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (305164056311) 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, 304951 + ... + 838643.

It is an arithmetic number, because the mean of its divisors is an integer number (36733357479).

Almost surely, 2^305164056321 is an apocalyptic number.

It is an amenable number.

305164056321 is a deficient number, since it is larger than the sum of its proper divisors (135636233427).

305164056321 is a wasteful number, since it uses less digits than its factorization.

305164056321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597232 (or 597229 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 305164056321 in words is "three hundred five billion, one hundred sixty-four million, fifty-six thousand, three hundred twenty-one".