27506506522421 has 2 divisors, whose sum is σ = 27506506522422. Its totient is φ = 27506506522420.

The previous prime is 27506506522373. The next prime is 27506506522427. The reversal of 27506506522421 is 12422560560572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22019603175025 + 5486903347396 = 4692505^2 + 2342414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27506506522421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27506506522427) 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, 13753253261210 + 13753253261211.

It is an arithmetic number, because the mean of its divisors is an integer number (13753253261211).

Almost surely, 2^{27506506522421} is an apocalyptic number.

It is an amenable number.

27506506522421 is a deficient number, since it is larger than the sum of its proper divisors (1).

27506506522421 is an equidigital number, since it uses as much as digits as its factorization.

27506506522421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016000, while the sum is 47.

The spelling of 27506506522421 in words is "twenty-seven trillion, five hundred six billion, five hundred six million, five hundred twenty-two thousand, four hundred twenty-one".