128145057085187 has 24 divisors (see below), whose sum is σ = 136983257143920. Its totient is φ = 119730539880000.

The previous prime is 128145057085183. The next prime is 128145057085193. The reversal of 128145057085187 is 781580750541821.

It is not a de Polignac number, because 128145057085187 - 2² = 128145057085183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128145057085183) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 898731833 + ... + 898874405.

It is an arithmetic number, because the mean of its divisors is an integer number (5707635714330).

Almost surely, 2^{128145057085187} is an apocalyptic number.

128145057085187 is a deficient number, since it is larger than the sum of its proper divisors (8838200058733).

128145057085187 is a wasteful number, since it uses less digits than its factorization.

128145057085187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174915 (or 174884 counting only the distinct ones).

The product of its (nonzero) digits is 25088000, while the sum is 62.

The spelling of 128145057085187 in words is "one hundred twenty-eight trillion, one hundred forty-five billion, fifty-seven million, eighty-five thousand, one hundred eighty-seven".