79644201228 has 18 divisors (see below), whose sum is σ = 201322842084. Its totient is φ = 26548067064.

The previous prime is 79644201227. The next prime is 79644201239. The reversal of 79644201228 is 82210244697.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (79644201227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1106169426 + ... + 1106169497.

It is an arithmetic number, because the mean of its divisors is an integer number (11184602338).

Almost surely, 2^79644201228 is an apocalyptic number.

It is an amenable number.

79644201228 is an abundant number, since it is smaller than the sum of its proper divisors (121678640856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79644201228 is a wasteful number, since it uses less digits than its factorization.

79644201228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212338933 (or 2212338928 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 79644201228 in words is "seventy-nine billion, six hundred forty-four million, two hundred one thousand, two hundred twenty-eight".