1377608198489 has 2 divisors, whose sum is σ = 1377608198490. Its totient is φ = 1377608198488.

The previous prime is 1377608198353. The next prime is 1377608198501. The reversal of 1377608198489 is 9848918067731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1077952680025 + 299655518464 = 1038245^2 + 547408^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1377608198489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1377608198089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688804099244 + 688804099245.

It is an arithmetic number, because the mean of its divisors is an integer number (688804099245).

Almost surely, 2^{1377608198489} is an apocalyptic number.

It is an amenable number.

1377608198489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377608198489 is an equidigital number, since it uses as much as digits as its factorization.

1377608198489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 146313216, while the sum is 71.

The spelling of 1377608198489 in words is "one trillion, three hundred seventy-seven billion, six hundred eight million, one hundred ninety-eight thousand, four hundred eighty-nine".