1198813556797 has 2 divisors, whose sum is σ = 1198813556798. Its totient is φ = 1198813556796.

The previous prime is 1198813556753. The next prime is 1198813556861. The reversal of 1198813556797 is 7976553188911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 966237884676 + 232575672121 = 982974^2 + 482261^2 .

It is an emirp because it is prime and its reverse (7976553188911) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1198813556797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1198813556747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599406778398 + 599406778399.

It is an arithmetic number, because the mean of its divisors is an integer number (599406778399).

Almost surely, 2^{1198813556797} is an apocalyptic number.

It is an amenable number.

1198813556797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1198813556797 is an equidigital number, since it uses as much as digits as its factorization.

1198813556797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 114307200, while the sum is 70.

The spelling of 1198813556797 in words is "one trillion, one hundred ninety-eight billion, eight hundred thirteen million, five hundred fifty-six thousand, seven hundred ninety-seven".