27780333461 has 2 divisors, whose sum is σ = 27780333462. Its totient is φ = 27780333460.

The previous prime is 27780333439. The next prime is 27780333463. The reversal of 27780333461 is 16433308772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24800265361 + 2980068100 = 157481^2 + 54590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27780333461 is a prime.

It is a Sophie Germain prime.

Together with 27780333463, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27780333463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13890166730 + 13890166731.

It is an arithmetic number, because the mean of its divisors is an integer number (13890166731).

Almost surely, 2^27780333461 is an apocalyptic number.

It is an amenable number.

27780333461 is a deficient number, since it is larger than the sum of its proper divisors (1).

27780333461 is an equidigital number, since it uses as much as digits as its factorization.

27780333461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 44.

The spelling of 27780333461 in words is "twenty-seven billion, seven hundred eighty million, three hundred thirty-three thousand, four hundred sixty-one".