27121684553429 has 2 divisors, whose sum is σ = 27121684553430. Its totient is φ = 27121684553428.

The previous prime is 27121684553417. The next prime is 27121684553647. The reversal of 27121684553429 is 92435548612172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15232277151025 + 11889407402404 = 3902855^2 + 3448102^2 .

It is a cyclic number.

It is not a de Polignac number, because 27121684553429 - 2⁴ = 27121684553413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27121684553729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13560842276714 + 13560842276715.

It is an arithmetic number, because the mean of its divisors is an integer number (13560842276715).

Almost surely, 2^{27121684553429} is an apocalyptic number.

It is an amenable number.

27121684553429 is a deficient number, since it is larger than the sum of its proper divisors (1).

27121684553429 is an equidigital number, since it uses as much as digits as its factorization.

27121684553429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29030400, while the sum is 59.

The spelling of 27121684553429 in words is "twenty-seven trillion, one hundred twenty-one billion, six hundred eighty-four million, five hundred fifty-three thousand, four hundred twenty-nine".