128243550727 has 8 divisors (see below), whose sum is σ = 130035215376. Its totient is φ = 126463408512.

The previous prime is 128243550713. The next prime is 128243550763. The reversal of 128243550727 is 727055342821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128243550727 - 2¹⁵ = 128243517959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128243553727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2858193 + ... + 2902714.

It is an arithmetic number, because the mean of its divisors is an integer number (16254401922).

Almost surely, 2^128243550727 is an apocalyptic number.

128243550727 is a deficient number, since it is larger than the sum of its proper divisors (1791664649).

128243550727 is a wasteful number, since it uses less digits than its factorization.

128243550727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5761217.

The product of its (nonzero) digits is 940800, while the sum is 46.

The spelling of 128243550727 in words is "one hundred twenty-eight billion, two hundred forty-three million, five hundred fifty thousand, seven hundred twenty-seven".