12201779448 has 48 divisors (see below), whose sum is σ = 33125437800. Its totient is φ = 4057542720.

The previous prime is 12201779407. The next prime is 12201779449. The reversal of 12201779448 is 84497710221.

12201779448 is a `hidden beast` number, since 12 + 20 + 177 + 9 + 448 = 666.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201779449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172063 + ... + 232398.

Almost surely, 2^12201779448 is an apocalyptic number.

12201779448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12201779448 is an abundant number, since it is smaller than the sum of its proper divisors (20923658352).

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

12201779448 is a wasteful number, since it uses less digits than its factorization.

12201779448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404892 (or 404885 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 12201779448 in words is "twelve billion, two hundred one million, seven hundred seventy-nine thousand, four hundred forty-eight".