27953190669749 has 2 divisors, whose sum is σ = 27953190669750. Its totient is φ = 27953190669748.

The previous prime is 27953190669743. The next prime is 27953190669787. The reversal of 27953190669749 is 94796609135972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24659666222500 + 3293524447249 = 4965850^2 + 1814807^2 .

It is a cyclic number.

It is not a de Polignac number, because 27953190669749 - 2²⁰ = 27953189621173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27953190669749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27953190669743) 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, 13976595334874 + 13976595334875.

It is an arithmetic number, because the mean of its divisors is an integer number (13976595334875).

Almost surely, 2^{27953190669749} is an apocalyptic number.

It is an amenable number.

27953190669749 is a deficient number, since it is larger than the sum of its proper divisors (1).

27953190669749 is an equidigital number, since it uses as much as digits as its factorization.

27953190669749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1388832480, while the sum is 77.

The spelling of 27953190669749 in words is "twenty-seven trillion, nine hundred fifty-three billion, one hundred ninety million, six hundred sixty-nine thousand, seven hundred forty-nine".