128454054009 has 4 divisors (see below), whose sum is σ = 171272072016. Its totient is φ = 85636036004.

The previous prime is 128454053989. The next prime is 128454054011. The reversal of 128454054009 is 900450454821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128454054009 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128454054109) 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, 21409008999 + ... + 21409009004.

It is an arithmetic number, because the mean of its divisors is an integer number (42818018004).

Almost surely, 2^128454054009 is an apocalyptic number.

It is an amenable number.

128454054009 is a deficient number, since it is larger than the sum of its proper divisors (42818018007).

128454054009 is an equidigital number, since it uses as much as digits as its factorization.

128454054009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42818018006.

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 128454054009 in words is "one hundred twenty-eight billion, four hundred fifty-four million, fifty-four thousand, nine".