1377520126349 has 2 divisors, whose sum is σ = 1377520126350. Its totient is φ = 1377520126348.

The previous prime is 1377520126291. The next prime is 1377520126357. The reversal of 1377520126349 is 9436210257731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 794626050724 + 582894075625 = 891418^2 + 763475^2 .

It is an emirp because it is prime and its reverse (9436210257731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1377520126349 - 2³⁶ = 1308800649613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1377520126297 and 1377520126306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1377520126949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688760063174 + 688760063175.

It is an arithmetic number, because the mean of its divisors is an integer number (688760063175).

Almost surely, 2^{1377520126349} is an apocalyptic number.

It is an amenable number.

1377520126349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377520126349 is an equidigital number, since it uses as much as digits as its factorization.

1377520126349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 50.

The spelling of 1377520126349 in words is "one trillion, three hundred seventy-seven billion, five hundred twenty million, one hundred twenty-six thousand, three hundred forty-nine".