1138915775549 has 2 divisors, whose sum is σ = 1138915775550. Its totient is φ = 1138915775548.

The previous prime is 1138915775537. The next prime is 1138915775603. The reversal of 1138915775549 is 9455775198311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 652977124900 + 485938650649 = 808070^2 + 697093^2 .

It is a cyclic number.

It is not a de Polignac number, because 1138915775549 - 2¹² = 1138915771453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1138915775749) 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, 569457887774 + 569457887775.

It is an arithmetic number, because the mean of its divisors is an integer number (569457887775).

Almost surely, 2^{1138915775549} is an apocalyptic number.

It is an amenable number.

1138915775549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1138915775549 is an equidigital number, since it uses as much as digits as its factorization.

1138915775549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628000, while the sum is 65.

The spelling of 1138915775549 in words is "one trillion, one hundred thirty-eight billion, nine hundred fifteen million, seven hundred seventy-five thousand, five hundred forty-nine".