12500385636 has 12 divisors (see below), whose sum is σ = 29167566512. Its totient is φ = 4166795208.

The previous prime is 12500385631. The next prime is 12500385671. The reversal of 12500385636 is 63658300521.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 12500385594 and 12500385603.

It is not an unprimeable number, because it can be changed into a prime (12500385631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 520849390 + ... + 520849413.

Almost surely, 2^12500385636 is an apocalyptic number.

It is an amenable number.

12500385636 is an abundant number, since it is smaller than the sum of its proper divisors (16667180876).

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

12500385636 is a wasteful number, since it uses less digits than its factorization.

12500385636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041698810 (or 1041698808 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 12500385636 in words is "twelve billion, five hundred million, three hundred eighty-five thousand, six hundred thirty-six".