27642922009 has 2 divisors, whose sum is σ = 27642922010. Its totient is φ = 27642922008.

The previous prime is 27642921931. The next prime is 27642922081. The reversal of 27642922009 is 90022924672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26321817600 + 1321104409 = 162240^2 + 36347^2 .

It is a cyclic number.

It is not a de Polignac number, because 27642922009 - 2⁹ = 27642921497 is a prime.

It is a super-2 number, since 2×27642922009² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27642922609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13821461004 + 13821461005.

It is an arithmetic number, because the mean of its divisors is an integer number (13821461005).

Almost surely, 2^27642922009 is an apocalyptic number.

It is an amenable number.

27642922009 is a deficient number, since it is larger than the sum of its proper divisors (1).

27642922009 is an equidigital number, since it uses as much as digits as its factorization.

27642922009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 27642922009 in words is "twenty-seven billion, six hundred forty-two million, nine hundred twenty-two thousand, nine".