128220209366 has 8 divisors (see below), whose sum is σ = 198534517824. Its totient is φ = 62042036760.

The previous prime is 128220209363. The next prime is 128220209389. The reversal of 128220209366 is 663902022821.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128220209363) 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, 1034033885 + ... + 1034034008.

It is an arithmetic number, because the mean of its divisors is an integer number (24816814728).

Almost surely, 2^128220209366 is an apocalyptic number.

128220209366 is a deficient number, since it is larger than the sum of its proper divisors (70314308458).

128220209366 is a wasteful number, since it uses less digits than its factorization.

128220209366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068067926.

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 128220209366 in words is "one hundred twenty-eight billion, two hundred twenty million, two hundred nine thousand, three hundred sixty-six".