128800692091 has 2 divisors, whose sum is σ = 128800692092. Its totient is φ = 128800692090.

The previous prime is 128800692019. The next prime is 128800692157. The reversal of 128800692091 is 190296008821.

Together with previous prime (128800692019) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128800692091 is a prime.

It is not a weakly prime, because it can be changed into another prime (128800692011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64400346045 + 64400346046.

It is an arithmetic number, because the mean of its divisors is an integer number (64400346046).

Almost surely, 2^128800692091 is an apocalyptic number.

128800692091 is a deficient number, since it is larger than the sum of its proper divisors (1).

128800692091 is an equidigital number, since it uses as much as digits as its factorization.

128800692091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 46.

The spelling of 128800692091 in words is "one hundred twenty-eight billion, eight hundred million, six hundred ninety-two thousand, ninety-one".