27081651469 has 2 divisors, whose sum is σ = 27081651470. Its totient is φ = 27081651468.

The previous prime is 27081651433. The next prime is 27081651557. The reversal of 27081651469 is 96415618072.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16138399369 + 10943252100 = 127037^2 + 104610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27081651469 is a prime.

It is a super-2 number, since 2×27081651469² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27021651469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13540825734 + 13540825735.

It is an arithmetic number, because the mean of its divisors is an integer number (13540825735).

Almost surely, 2^27081651469 is an apocalyptic number.

It is an amenable number.

27081651469 is a deficient number, since it is larger than the sum of its proper divisors (1).

27081651469 is an equidigital number, since it uses as much as digits as its factorization.

27081651469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 27081651469 in words is "twenty-seven billion, eighty-one million, six hundred fifty-one thousand, four hundred sixty-nine".