1998810350863 has 2 divisors, whose sum is σ = 1998810350864. Its totient is φ = 1998810350862.

The previous prime is 1998810350857. The next prime is 1998810350879. The reversal of 1998810350863 is 3680530188991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1998810350863 - 2⁹ = 1998810350351 is a prime.

It is a super-3 number, since 3×1998810350863³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1998810350813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999405175431 + 999405175432.

It is an arithmetic number, because the mean of its divisors is an integer number (999405175432).

Almost surely, 2^{1998810350863} is an apocalyptic number.

1998810350863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1998810350863 is an equidigital number, since it uses as much as digits as its factorization.

1998810350863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11197440, while the sum is 61.

The spelling of 1998810350863 in words is "one trillion, nine hundred ninety-eight billion, eight hundred ten million, three hundred fifty thousand, eight hundred sixty-three".