1368789815977 has 2 divisors, whose sum is σ = 1368789815978. Its totient is φ = 1368789815976.

The previous prime is 1368789815969. The next prime is 1368789815989. The reversal of 1368789815977 is 7795189878631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1280946340521 + 87843475456 = 1131789^2 + 296384^2 .

It is a cyclic number.

It is not a de Polignac number, because 1368789815977 - 2³ = 1368789815969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1368789815897 and 1368789815906.

It is not a weakly prime, because it can be changed into another prime (1368789815777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684394907988 + 684394907989.

It is an arithmetic number, because the mean of its divisors is an integer number (684394907989).

Almost surely, 2^{1368789815977} is an apocalyptic number.

It is an amenable number.

1368789815977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1368789815977 is an equidigital number, since it uses as much as digits as its factorization.

1368789815977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1280240640, while the sum is 79.

The spelling of 1368789815977 in words is "one trillion, three hundred sixty-eight billion, seven hundred eighty-nine million, eight hundred fifteen thousand, nine hundred seventy-seven".