27533154165889 has 2 divisors, whose sum is σ = 27533154165890. Its totient is φ = 27533154165888.

The previous prime is 27533154165887. The next prime is 27533154165931. The reversal of 27533154165889 is 98856145133572.

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., 24178688655489 + 3354465510400 = 4917183^2 + 1831520^2 .

It is a cyclic number.

It is not a de Polignac number, because 27533154165889 - 2¹ = 27533154165887 is a prime.

It is a super-2 number, since 2×27533154165889² (a number of 28 digits) contains 22 as substring.

Together with 27533154165887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27533154165883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13766577082944 + 13766577082945.

It is an arithmetic number, because the mean of its divisors is an integer number (13766577082945).

Almost surely, 2^{27533154165889} is an apocalyptic number.

It is an amenable number.

27533154165889 is a deficient number, since it is larger than the sum of its proper divisors (1).

27533154165889 is an equidigital number, since it uses as much as digits as its factorization.

27533154165889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728000, while the sum is 67.

The spelling of 27533154165889 in words is "twenty-seven trillion, five hundred thirty-three billion, one hundred fifty-four million, one hundred sixty-five thousand, eight hundred eighty-nine".