30840082561 has 2 divisors, whose sum is σ = 30840082562. Its totient is φ = 30840082560.

The previous prime is 30840082547. The next prime is 30840082583. The reversal of 30840082561 is 16528004803.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29875048336 + 965034225 = 172844^2 + 31065^2 .

It is an emirp because it is prime and its reverse (16528004803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30840082561 - 2¹⁹ = 30839558273 is a prime.

It is a super-2 number, since 2×30840082561² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30840082561.

It is not a weakly prime, because it can be changed into another prime (30840082661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15420041280 + 15420041281.

It is an arithmetic number, because the mean of its divisors is an integer number (15420041281).

Almost surely, 2^30840082561 is an apocalyptic number.

It is an amenable number.

30840082561 is a deficient number, since it is larger than the sum of its proper divisors (1).

30840082561 is an equidigital number, since it uses as much as digits as its factorization.

30840082561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 30840082561 in words is "thirty billion, eight hundred forty million, eighty-two thousand, five hundred sixty-one".