128201196685987 has 2 divisors, whose sum is σ = 128201196685988. Its totient is φ = 128201196685986.

The previous prime is 128201196685963. The next prime is 128201196686023. The reversal of 128201196685987 is 789586691102821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128201196685987 - 2²³ = 128201188297379 is a prime.

It is not a weakly prime, because it can be changed into another prime (128201196685927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64100598342993 + 64100598342994.

It is an arithmetic number, because the mean of its divisors is an integer number (64100598342994).

Almost surely, 2^{128201196685987} is an apocalyptic number.

128201196685987 is a deficient number, since it is larger than the sum of its proper divisors (1).

128201196685987 is an equidigital number, since it uses as much as digits as its factorization.

128201196685987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209018880, while the sum is 73.

The spelling of 128201196685987 in words is "one hundred twenty-eight trillion, two hundred one billion, one hundred ninety-six million, six hundred eighty-five thousand, nine hundred eighty-seven".