30568675921 has 9 divisors (see below), whose sum is σ = 35560903899. Its totient is φ = 26200673184.

The previous prime is 30568675913. The next prime is 30568675927. The reversal of 30568675921 is 12957686503.

The square root of 30568675921 is 174839.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 548262225 + 30020413696 = 23415^2 + 173264^2 .

It is not a de Polignac number, because 30568675921 - 2³ = 30568675913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30568675927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1211385 + ... + 1236361.

Almost surely, 2^30568675921 is an apocalyptic number.

30568675921 is the 174839-th square number.

30568675921 is the 87420-th centered octagonal number.

It is an amenable number.

30568675921 is a deficient number, since it is larger than the sum of its proper divisors (4992227978).

30568675921 is an frugal number, since it uses more digits than its factorization.

30568675921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49968 (or 24984 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 30568675921 in words is "thirty billion, five hundred sixty-eight million, six hundred seventy-five thousand, nine hundred twenty-one".