128345813641 has 4 divisors (see below), whose sum is σ = 133926066432. Its totient is φ = 122765560852.

The previous prime is 128345813627. The next prime is 128345813759. The reversal of 128345813641 is 146318543821.

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 128345813641 - 2⁹ = 128345813129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128345813591 and 128345813600.

It is not an unprimeable number, because it can be changed into a prime (128345813041) 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, 2790126361 + ... + 2790126406.

It is an arithmetic number, because the mean of its divisors is an integer number (33481516608).

Almost surely, 2^128345813641 is an apocalyptic number.

It is an amenable number.

128345813641 is a deficient number, since it is larger than the sum of its proper divisors (5580252791).

128345813641 is an equidigital number, since it uses as much as digits as its factorization.

128345813641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5580252790.

The product of its digits is 552960, while the sum is 46.

The spelling of 128345813641 in words is "one hundred twenty-eight billion, three hundred forty-five million, eight hundred thirteen thousand, six hundred forty-one".