1538328311549 has 2 divisors, whose sum is σ = 1538328311550. Its totient is φ = 1538328311548.

The previous prime is 1538328311519. The next prime is 1538328311579. The reversal of 1538328311549 is 9451138238351.

It is a balanced prime because it is at equal distance from previous prime (1538328311519) and next prime (1538328311579).

It can be written as a sum of positive squares in only one way, i.e., 1414172856100 + 124155455449 = 1189190^2 + 352357^2 .

It is a cyclic number.

It is not a de Polignac number, because 1538328311549 - 2²⁰ = 1538327262973 is a prime.

It is a super-2 number, since 2×1538328311549² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1538328311549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1538328311519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769164155774 + 769164155775.

It is an arithmetic number, because the mean of its divisors is an integer number (769164155775).

Almost surely, 2^{1538328311549} is an apocalyptic number.

It is an amenable number.

1538328311549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538328311549 is an equidigital number, since it uses as much as digits as its factorization.

1538328311549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3110400, while the sum is 53.

The spelling of 1538328311549 in words is "one trillion, five hundred thirty-eight billion, three hundred twenty-eight million, three hundred eleven thousand, five hundred forty-nine".