1618733143777 has 2 divisors, whose sum is σ = 1618733143778. Its totient is φ = 1618733143776.

The previous prime is 1618733143757. The next prime is 1618733143787. The reversal of 1618733143777 is 7773413378161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1371688358481 + 247044785296 = 1171191^2 + 497036^2 .

It is an emirp because it is prime and its reverse (7773413378161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1618733143777 is a prime.

It is not a weakly prime, because it can be changed into another prime (1618733143717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 809366571888 + 809366571889.

It is an arithmetic number, because the mean of its divisors is an integer number (809366571889).

Almost surely, 2^{1618733143777} is an apocalyptic number.

It is an amenable number.

1618733143777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1618733143777 is an equidigital number, since it uses as much as digits as its factorization.

1618733143777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12446784, while the sum is 58.

The spelling of 1618733143777 in words is "one trillion, six hundred eighteen billion, seven hundred thirty-three million, one hundred forty-three thousand, seven hundred seventy-seven".