19698860568091 has 2 divisors, whose sum is σ = 19698860568092. Its totient is φ = 19698860568090.

The previous prime is 19698860568077. The next prime is 19698860568157. The reversal of 19698860568091 is 19086506889691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19698860568091 - 2⁷ = 19698860567963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19698860567999 and 19698860568017.

It is not a weakly prime, because it can be changed into another prime (19698860568991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9849430284045 + 9849430284046.

It is an arithmetic number, because the mean of its divisors is an integer number (9849430284046).

Almost surely, 2^{19698860568091} is an apocalyptic number.

19698860568091 is a deficient number, since it is larger than the sum of its proper divisors (1).

19698860568091 is an equidigital number, since it uses as much as digits as its factorization.

19698860568091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403107840, while the sum is 76.

The spelling of 19698860568091 in words is "nineteen trillion, six hundred ninety-eight billion, eight hundred sixty million, five hundred sixty-eight thousand, ninety-one".