12581500004 has 18 divisors (see below), whose sum is σ = 22214285730. Its totient is φ = 6235054336.

The previous prime is 12581500003. The next prime is 12581500037. The reversal of 12581500004 is 40000518521.

It can be written as a sum of positive squares in 3 ways, for example, as 1047169600 + 11534330404 = 32360^2 + 107398^2 .

It is not an unprimeable number, because it can be changed into a prime (12581500003) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 72089 + ... + 174240.

It is an arithmetic number, because the mean of its divisors is an integer number (1234126985).

Almost surely, 2^12581500004 is an apocalyptic number.

It is an amenable number.

12581500004 is a deficient number, since it is larger than the sum of its proper divisors (9632785726).

12581500004 is a wasteful number, since it uses less digits than its factorization.

12581500004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246559 (or 246444 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The spelling of 12581500004 in words is "twelve billion, five hundred eighty-one million, five hundred thousand, four".