27438608069 has 2 divisors, whose sum is σ = 27438608070. Its totient is φ = 27438608068.

The previous prime is 27438608053. The next prime is 27438608077. The reversal of 27438608069 is 96080683472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27138279169 + 300328900 = 164737^2 + 17330^2 .

It is a cyclic number.

It is not a de Polignac number, because 27438608069 - 2⁴ = 27438608053 is a prime.

It is a super-2 number, since 2×27438608069² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27438608069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27438608269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13719304034 + 13719304035.

It is an arithmetic number, because the mean of its divisors is an integer number (13719304035).

Almost surely, 2^27438608069 is an apocalyptic number.

It is an amenable number.

27438608069 is a deficient number, since it is larger than the sum of its proper divisors (1).

27438608069 is an equidigital number, since it uses as much as digits as its factorization.

27438608069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 27438608069 in words is "twenty-seven billion, four hundred thirty-eight million, six hundred eight thousand, sixty-nine".