27945858469 has 2 divisors, whose sum is σ = 27945858470. Its totient is φ = 27945858468.

The previous prime is 27945858461. The next prime is 27945858547. The reversal of 27945858469 is 96485854972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27790557025 + 155301444 = 166705^2 + 12462^2 .

It is a cyclic number.

It is not a de Polignac number, because 27945858469 - 2³ = 27945858461 is a prime.

It is a super-2 number, since 2×27945858469² (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 (27945858461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13972929234 + 13972929235.

It is an arithmetic number, because the mean of its divisors is an integer number (13972929235).

Almost surely, 2^27945858469 is an apocalyptic number.

It is an amenable number.

27945858469 is a deficient number, since it is larger than the sum of its proper divisors (1).

27945858469 is an equidigital number, since it uses as much as digits as its factorization.

27945858469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174182400, while the sum is 67.

The spelling of 27945858469 in words is "twenty-seven billion, nine hundred forty-five million, eight hundred fifty-eight thousand, four hundred sixty-nine".