1377743215361 has 2 divisors, whose sum is σ = 1377743215362. Its totient is φ = 1377743215360.

The previous prime is 1377743215283. The next prime is 1377743215483. The reversal of 1377743215361 is 1635123477731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1269410075761 + 108333139600 = 1126681^2 + 329140^2 .

It is an emirp because it is prime and its reverse (1635123477731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1377743215361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1377743215861) 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, 688871607680 + 688871607681.

It is an arithmetic number, because the mean of its divisors is an integer number (688871607681).

Almost surely, 2^{1377743215361} is an apocalyptic number.

It is an amenable number.

1377743215361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377743215361 is an equidigital number, since it uses as much as digits as its factorization.

1377743215361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2222640, while the sum is 50.

The spelling of 1377743215361 in words is "one trillion, three hundred seventy-seven billion, seven hundred forty-three million, two hundred fifteen thousand, three hundred sixty-one".