30561334081 has 2 divisors, whose sum is σ = 30561334082. Its totient is φ = 30561334080.

The previous prime is 30561334079. The next prime is 30561334093. The reversal of 30561334081 is 18043316503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28798090000 + 1763244081 = 169700^2 + 41991^2 .

It is a cyclic number.

It is not a de Polignac number, because 30561334081 - 2¹ = 30561334079 is a prime.

It is a super-2 number, since 2×30561334081² (a number of 22 digits) contains 22 as substring.

Together with 30561334079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30561334381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15280667040 + 15280667041.

It is an arithmetic number, because the mean of its divisors is an integer number (15280667041).

Almost surely, 2^30561334081 is an apocalyptic number.

It is an amenable number.

30561334081 is a deficient number, since it is larger than the sum of its proper divisors (1).

30561334081 is an equidigital number, since it uses as much as digits as its factorization.

30561334081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 30561334081 in words is "thirty billion, five hundred sixty-one million, three hundred thirty-four thousand, eighty-one".