128953024417 has 4 divisors (see below), whose sum is σ = 147374885056. Its totient is φ = 110531163780.

The previous prime is 128953024399. The next prime is 128953024439. The reversal of 128953024417 is 714420359821.

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 not a de Polignac number, because 128953024417 - 2²⁷ = 128818806689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128953022417) 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, 9210930309 + ... + 9210930322.

It is an arithmetic number, because the mean of its divisors is an integer number (36843721264).

Almost surely, 2^128953024417 is an apocalyptic number.

It is an amenable number.

128953024417 is a deficient number, since it is larger than the sum of its proper divisors (18421860639).

128953024417 is an equidigital number, since it uses as much as digits as its factorization.

128953024417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18421860638.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 128953024417 in words is "one hundred twenty-eight billion, nine hundred fifty-three million, twenty-four thousand, four hundred seventeen".