27941481649 has 2 divisors, whose sum is σ = 27941481650. Its totient is φ = 27941481648.

The previous prime is 27941481619. The next prime is 27941481653. The reversal of 27941481649 is 94618414972.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25239041424 + 2702440225 = 158868^2 + 51985^2 .

It is a cyclic number.

It is not a de Polignac number, because 27941481649 - 2¹⁵ = 27941448881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27941481649.

It is not a weakly prime, because it can be changed into another prime (27941481619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13970740824 + 13970740825.

It is an arithmetic number, because the mean of its divisors is an integer number (13970740825).

Almost surely, 2^27941481649 is an apocalyptic number.

It is an amenable number.

27941481649 is a deficient number, since it is larger than the sum of its proper divisors (1).

27941481649 is an equidigital number, since it uses as much as digits as its factorization.

27941481649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 55.

The spelling of 27941481649 in words is "twenty-seven billion, nine hundred forty-one million, four hundred eighty-one thousand, six hundred forty-nine".