128450841521 has 8 divisors (see below), whose sum is σ = 128583158400. Its totient is φ = 128318576848.

The previous prime is 128450841517. The next prime is 128450841551. The reversal of 128450841521 is 125148054821.

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 128450841521 - 2² = 128450841517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128450841551) 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, 6501560 + ... + 6521286.

It is an arithmetic number, because the mean of its divisors is an integer number (16072894800).

Almost surely, 2^128450841521 is an apocalyptic number.

It is an amenable number.

128450841521 is a deficient number, since it is larger than the sum of its proper divisors (132316879).

128450841521 is a wasteful number, since it uses less digits than its factorization.

128450841521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26103.

The product of its (nonzero) digits is 102400, while the sum is 41.

The spelling of 128450841521 in words is "one hundred twenty-eight billion, four hundred fifty million, eight hundred forty-one thousand, five hundred twenty-one".