12557728080 has 200 divisors, whose sum is σ = 43781912064. Its totient is φ = 3335904000.

The previous prime is 12557728061. The next prime is 12557728087. The reversal of 12557728080 is 8082775521.

12557728080 is a `hidden beast` number, since 12 + 557 + 7 + 2 + 8 + 0 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12557728087) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1752505 + ... + 1759655.

Almost surely, 2^12557728080 is an apocalyptic number.

12557728080 is a gapful number since it is divisible by the number (10) 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 12557728080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21890956032).

12557728080 is an abundant number, since it is smaller than the sum of its proper divisors (31224183984).

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

12557728080 is a wasteful number, since it uses less digits than its factorization.

12557728080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7447 (or 7432 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 45.

The spelling of 12557728080 in words is "twelve billion, five hundred fifty-seven million, seven hundred twenty-eight thousand, eighty".