27421185109 has 2 divisors, whose sum is σ = 27421185110. Its totient is φ = 27421185108.

The previous prime is 27421185089. The next prime is 27421185131. The reversal of 27421185109 is 90158112472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24251832900 + 3169352209 = 155730^2 + 56297^2 .

It is a cyclic number.

It is not a de Polignac number, because 27421185109 - 2⁹ = 27421184597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27421155109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13710592554 + 13710592555.

It is an arithmetic number, because the mean of its divisors is an integer number (13710592555).

Almost surely, 2^27421185109 is an apocalyptic number.

It is an amenable number.

27421185109 is a deficient number, since it is larger than the sum of its proper divisors (1).

27421185109 is an equidigital number, since it uses as much as digits as its factorization.

27421185109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The spelling of 27421185109 in words is "twenty-seven billion, four hundred twenty-one million, one hundred eighty-five thousand, one hundred nine".