128207677123 has 2 divisors, whose sum is σ = 128207677124. Its totient is φ = 128207677122.

The previous prime is 128207677121. The next prime is 128207677127. The reversal of 128207677123 is 321776702821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128207677123 - 2¹ = 128207677121 is a prime.

Together with 128207677121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (128207677121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64103838561 + 64103838562.

It is an arithmetic number, because the mean of its divisors is an integer number (64103838562).

Almost surely, 2^128207677123 is an apocalyptic number.

128207677123 is a deficient number, since it is larger than the sum of its proper divisors (1).

128207677123 is an equidigital number, since it uses as much as digits as its factorization.

128207677123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 46.

The spelling of 128207677123 in words is "one hundred twenty-eight billion, two hundred seven million, six hundred seventy-seven thousand, one hundred twenty-three".