27873617669 has 2 divisors, whose sum is σ = 27873617670. Its totient is φ = 27873617668.

The previous prime is 27873617647. The next prime is 27873617711. The reversal of 27873617669 is 96671637872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19888050625 + 7985567044 = 141025^2 + 89362^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27873617669 is a prime.

It is a super-2 number, since 2×27873617669² (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 (27873617969) 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, 13936808834 + 13936808835.

It is an arithmetic number, because the mean of its divisors is an integer number (13936808835).

Almost surely, 2^27873617669 is an apocalyptic number.

It is an amenable number.

27873617669 is a deficient number, since it is larger than the sum of its proper divisors (1).

27873617669 is an equidigital number, since it uses as much as digits as its factorization.

27873617669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32006016, while the sum is 62.

The spelling of 27873617669 in words is "twenty-seven billion, eight hundred seventy-three million, six hundred seventeen thousand, six hundred sixty-nine".