27953009869 has 2 divisors, whose sum is σ = 27953009870. Its totient is φ = 27953009868.

The previous prime is 27953009863. The next prime is 27953009927. The reversal of 27953009869 is 96890035972.

It is an a-pointer prime, because the next prime (27953009927) can be obtained adding 27953009869 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23107040100 + 4845969769 = 152010^2 + 69613^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27953009869 is a prime.

It is a super-2 number, since 2×27953009869² (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 (27953009863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13976504934 + 13976504935.

It is an arithmetic number, because the mean of its divisors is an integer number (13976504935).

Almost surely, 2^27953009869 is an apocalyptic number.

It is an amenable number.

27953009869 is a deficient number, since it is larger than the sum of its proper divisors (1).

27953009869 is an equidigital number, since it uses as much as digits as its factorization.

27953009869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7348320, while the sum is 58.

The spelling of 27953009869 in words is "twenty-seven billion, nine hundred fifty-three million, nine thousand, eight hundred sixty-nine".