12445779528 has 192 divisors, whose sum is σ = 41815388160. Its totient is φ = 3256339968.

The previous prime is 12445779523. The next prime is 12445779539. The reversal of 12445779528 is 82597754421.

12445779528 is a `hidden beast` number, since 1 + 2 + 4 + 45 + 7 + 79 + 528 = 666.

It is not an unprimeable number, because it can be changed into a prime (12445779523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 824626 + ... + 839582.

It is an arithmetic number, because the mean of its divisors is an integer number (217788480).

Almost surely, 2^12445779528 is an apocalyptic number.

12445779528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12445779528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20907694080).

12445779528 is an abundant number, since it is smaller than the sum of its proper divisors (29369608632).

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

12445779528 is a wasteful number, since it uses less digits than its factorization.

12445779528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15116 (or 15109 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 54.

The spelling of 12445779528 in words is "twelve billion, four hundred forty-five million, seven hundred seventy-nine thousand, five hundred twenty-eight".