30974932561 has 2 divisors, whose sum is σ = 30974932562. Its totient is φ = 30974932560.

The previous prime is 30974932529. The next prime is 30974932607. The reversal of 30974932561 is 16523947903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29618410000 + 1356522561 = 172100^2 + 36831^2 .

It is a cyclic number.

It is not a de Polignac number, because 30974932561 - 2⁵ = 30974932529 is a prime.

It is not a weakly prime, because it can be changed into another prime (30974932061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15487466280 + 15487466281.

It is an arithmetic number, because the mean of its divisors is an integer number (15487466281).

Almost surely, 2^30974932561 is an apocalyptic number.

It is an amenable number.

30974932561 is a deficient number, since it is larger than the sum of its proper divisors (1).

30974932561 is an equidigital number, since it uses as much as digits as its factorization.

30974932561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 49.

The spelling of 30974932561 in words is "thirty billion, nine hundred seventy-four million, nine hundred thirty-two thousand, five hundred sixty-one".