128551421095 has 4 divisors (see below), whose sum is σ = 154261705320. Its totient is φ = 102841136872.

The previous prime is 128551421081. The next prime is 128551421107. The reversal of 128551421095 is 590124155821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 590124155821 = 31 ⋅19036263091.

It is a cyclic number.

It is not a de Polignac number, because 128551421095 - 2¹⁵ = 128551388327 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12855142105 + ... + 12855142114.

It is an arithmetic number, because the mean of its divisors is an integer number (38565426330).

Almost surely, 2^128551421095 is an apocalyptic number.

128551421095 is a deficient number, since it is larger than the sum of its proper divisors (25710284225).

128551421095 is an equidigital number, since it uses as much as digits as its factorization.

128551421095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25710284224.

The product of its (nonzero) digits is 144000, while the sum is 43.

The spelling of 128551421095 in words is "one hundred twenty-eight billion, five hundred fifty-one million, four hundred twenty-one thousand, ninety-five".