27404189703521 has 2 divisors, whose sum is σ = 27404189703522. Its totient is φ = 27404189703520.

The previous prime is 27404189703491. The next prime is 27404189703529. The reversal of 27404189703521 is 12530798140472.

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., 27356414672896 + 47775030625 = 5230336^2 + 218575^2 .

It is a cyclic number.

It is not a de Polignac number, because 27404189703521 - 2²⁶ = 27404122594657 is a prime.

It is a super-2 number, since 2×27404189703521² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27404189703529) 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, 13702094851760 + 13702094851761.

It is an arithmetic number, because the mean of its divisors is an integer number (13702094851761).

Almost surely, 2^{27404189703521} is an apocalyptic number.

It is an amenable number.

27404189703521 is a deficient number, since it is larger than the sum of its proper divisors (1).

27404189703521 is an equidigital number, since it uses as much as digits as its factorization.

27404189703521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 27404189703521 in words is "twenty-seven trillion, four hundred four billion, one hundred eighty-nine million, seven hundred three thousand, five hundred twenty-one".