128258366813727 has 4 divisors (see below), whose sum is σ = 171011155751640. Its totient is φ = 85505577875816.

The previous prime is 128258366813711. The next prime is 128258366813771. The reversal of 128258366813727 is 727318663852821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128258366813727 - 2⁴ = 128258366813711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128258366813827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21376394468952 + ... + 21376394468957.

It is an arithmetic number, because the mean of its divisors is an integer number (42752788937910).

Almost surely, 2^{128258366813727} is an apocalyptic number.

128258366813727 is a deficient number, since it is larger than the sum of its proper divisors (42752788937913).

128258366813727 is an equidigital number, since it uses as much as digits as its factorization.

128258366813727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42752788937912.

The product of its digits is 325140480, while the sum is 69.

The spelling of 128258366813727 in words is "one hundred twenty-eight trillion, two hundred fifty-eight billion, three hundred sixty-six million, eight hundred thirteen thousand, seven hundred twenty-seven".