12581806860 has 144 divisors (see below), whose sum is σ = 44025037056. Its totient is φ = 2848934016.

The previous prime is 12581806849. The next prime is 12581806871. The reversal of 12581806860 is 6860818521.

12581806860 is a `hidden beast` number, since 1 + 2 + 581 + 8 + 0 + 6 + 8 + 60 = 666.

It is an interprime number because it is at equal distance from previous prime (12581806849) and next prime (12581806871).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88159 + ... + 181481.

It is an arithmetic number, because the mean of its divisors is an integer number (305729424).

Almost surely, 2^12581806860 is an apocalyptic number.

12581806860 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 12581806860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22012518528).

12581806860 is an abundant number, since it is smaller than the sum of its proper divisors (31443230196).

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

12581806860 is a wasteful number, since it uses less digits than its factorization.

12581806860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93452 (or 93447 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The spelling of 12581806860 in words is "twelve billion, five hundred eighty-one million, eight hundred six thousand, eight hundred sixty".