1913145163777 has 2 divisors, whose sum is σ = 1913145163778. Its totient is φ = 1913145163776.

The previous prime is 1913145163771. The next prime is 1913145163817. The reversal of 1913145163777 is 7773615413191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1449317423376 + 463827740401 = 1203876^2 + 681049^2 .

It is an emirp because it is prime and its reverse (7773615413191) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1913145163777 is a prime.

It is not a weakly prime, because it can be changed into another prime (1913145163771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956572581888 + 956572581889.

It is an arithmetic number, because the mean of its divisors is an integer number (956572581889).

Almost surely, 2^{1913145163777} is an apocalyptic number.

It is an amenable number.

1913145163777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1913145163777 is an equidigital number, since it uses as much as digits as its factorization.

1913145163777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3333960, while the sum is 55.

The spelling of 1913145163777 in words is "one trillion, nine hundred thirteen billion, one hundred forty-five million, one hundred sixty-three thousand, seven hundred seventy-seven".