1218198917363 has 2 divisors, whose sum is σ = 1218198917364. Its totient is φ = 1218198917362.

The previous prime is 1218198917323. The next prime is 1218198917371. The reversal of 1218198917363 is 3637198918121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1218198917363 - 2²⁰ = 1218197868787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1218198917323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609099458681 + 609099458682.

It is an arithmetic number, because the mean of its divisors is an integer number (609099458682).

Almost surely, 2^{1218198917363} is an apocalyptic number.

1218198917363 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218198917363 is an equidigital number, since it uses as much as digits as its factorization.

1218198917363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 59.

The spelling of 1218198917363 in words is "one trillion, two hundred eighteen billion, one hundred ninety-eight million, nine hundred seventeen thousand, three hundred sixty-three".