12556151520 has 384 divisors, whose sum is σ = 46402191360. Its totient is φ = 2821294080.

The previous prime is 12556151437. The next prime is 12556151527. The reversal of 12556151520 is 2515165521.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12556151527) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4713709 + ... + 4716371.

It is an arithmetic number, because the mean of its divisors is an integer number (120839040).

Almost surely, 2^12556151520 is an apocalyptic number.

12556151520 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 12556151520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23201095680).

12556151520 is an abundant number, since it is smaller than the sum of its proper divisors (33846039840).

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

12556151520 is a wasteful number, since it uses less digits than its factorization.

12556151520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758 (or 2750 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 33.

The spelling of 12556151520 in words is "twelve billion, five hundred fifty-six million, one hundred fifty-one thousand, five hundred twenty".