27121774441 has 2 divisors, whose sum is σ = 27121774442. Its totient is φ = 27121774440.

The previous prime is 27121774423. The next prime is 27121774451. The reversal of 27121774441 is 14447712172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23622460416 + 3499314025 = 153696^2 + 59155^2 .

It is a cyclic number.

It is not a de Polignac number, because 27121774441 - 2²¹ = 27119677289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27121774394 and 27121774403.

It is not a weakly prime, because it can be changed into another prime (27121774451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13560887220 + 13560887221.

It is an arithmetic number, because the mean of its divisors is an integer number (13560887221).

Almost surely, 2^27121774441 is an apocalyptic number.

It is an amenable number.

27121774441 is a deficient number, since it is larger than the sum of its proper divisors (1).

27121774441 is an equidigital number, since it uses as much as digits as its factorization.

27121774441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87808, while the sum is 40.

The spelling of 27121774441 in words is "twenty-seven billion, one hundred twenty-one million, seven hundred seventy-four thousand, four hundred forty-one".