128355741321 has 8 divisors (see below), whose sum is σ = 171151963680. Its totient is φ = 85565006592.

The previous prime is 128355741313. The next prime is 128355741323. The reversal of 128355741321 is 123147553821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128355741321 - 2³ = 128355741313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128355741323) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1317016 + ... + 1411113.

It is an arithmetic number, because the mean of its divisors is an integer number (21393995460).

Almost surely, 2^128355741321 is an apocalyptic number.

It is an amenable number.

128355741321 is a deficient number, since it is larger than the sum of its proper divisors (42796222359).

128355741321 is a wasteful number, since it uses less digits than its factorization.

128355741321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743815.

The product of its digits is 201600, while the sum is 42.

The spelling of 128355741321 in words is "one hundred twenty-eight billion, three hundred fifty-five million, seven hundred forty-one thousand, three hundred twenty-one".