98378653864889 has 2 divisors, whose sum is σ = 98378653864890. Its totient is φ = 98378653864888.

The previous prime is 98378653864847. The next prime is 98378653864891. The reversal of 98378653864889 is 98846835687389.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87254374410025 + 11124279454864 = 9341005^2 + 3335308^2 .

It is a cyclic number.

It is not a de Polignac number, because 98378653864889 - 2³² = 98374358897593 is a prime.

Together with 98378653864891, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 98378653864798 and 98378653864807.

It is not a weakly prime, because it can be changed into another prime (98378653834889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49189326932444 + 49189326932445.

It is an arithmetic number, because the mean of its divisors is an integer number (49189326932445).

Almost surely, 2^{98378653864889} is an apocalyptic number.

It is an amenable number.

98378653864889 is a deficient number, since it is larger than the sum of its proper divisors (1).

98378653864889 is an equidigital number, since it uses as much as digits as its factorization.

98378653864889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120394874880, while the sum is 92.

The spelling of 98378653864889 in words is "ninety-eight trillion, three hundred seventy-eight billion, six hundred fifty-three million, eight hundred sixty-four thousand, eight hundred eighty-nine".