12581266152 has 128 divisors (see below), whose sum is σ = 38838159360. Its totient is φ = 3307288320.

The previous prime is 12581266147. The next prime is 12581266153. The reversal of 12581266152 is 25166218521.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 12581266152.

It is not an unprimeable number, because it can be changed into a prime (12581266153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 669963 + ... + 688485.

It is an arithmetic number, because the mean of its divisors is an integer number (303423120).

Almost surely, 2^12581266152 is an apocalyptic number.

12581266152 is a gapful number since it is divisible by the number (12) 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 12581266152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19419079680).

12581266152 is an abundant number, since it is smaller than the sum of its proper divisors (26256893208).

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

12581266152 is a wasteful number, since it uses less digits than its factorization.

12581266152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18863 (or 18859 counting only the distinct ones).

The product of its digits is 57600, while the sum is 39.

The spelling of 12581266152 in words is "twelve billion, five hundred eighty-one million, two hundred sixty-six thousand, one hundred fifty-two".