198712619772859 has 2 divisors, whose sum is σ = 198712619772860. Its totient is φ = 198712619772858.

The previous prime is 198712619772817. The next prime is 198712619772911. The reversal of 198712619772859 is 958277916217891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198712619772859 - 2¹⁷ = 198712619641787 is a prime.

It is a super-2 number, since 2×198712619772859² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (198712619779859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99356309886429 + 99356309886430.

It is an arithmetic number, because the mean of its divisors is an integer number (99356309886430).

Almost surely, 2^{198712619772859} is an apocalyptic number.

198712619772859 is a deficient number, since it is larger than the sum of its proper divisors (1).

198712619772859 is an equidigital number, since it uses as much as digits as its factorization.

198712619772859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920360960, while the sum is 82.

The spelling of 198712619772859 in words is "one hundred ninety-eight trillion, seven hundred twelve billion, six hundred nineteen million, seven hundred seventy-two thousand, eight hundred fifty-nine".