27072921611 has 2 divisors, whose sum is σ = 27072921612. Its totient is φ = 27072921610.

The previous prime is 27072921553. The next prime is 27072921649. The reversal of 27072921611 is 11612927072.

It is a happy number.

It is an a-pointer prime, because the next prime (27072921649) can be obtained adding 27072921611 to its sum of digits (38).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27072921611 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (27072921691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13536460805 + 13536460806.

It is an arithmetic number, because the mean of its divisors is an integer number (13536460806).

Almost surely, 2^27072921611 is an apocalyptic number.

27072921611 is a deficient number, since it is larger than the sum of its proper divisors (1).

27072921611 is an equidigital number, since it uses as much as digits as its factorization.

27072921611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 38.

The spelling of 27072921611 in words is "twenty-seven billion, seventy-two million, nine hundred twenty-one thousand, six hundred eleven".