12506135785 has 32 divisors (see below), whose sum is σ = 18199802880. Its totient is φ = 8124883200.

The previous prime is 12506135773. The next prime is 12506135809. The reversal of 12506135785 is 58753160521.

It is a happy number.

It is not a de Polignac number, because 12506135785 - 2⁹ = 12506135273 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259950 + ... + 304279.

It is an arithmetic number, because the mean of its divisors is an integer number (568743840).

Almost surely, 2^12506135785 is an apocalyptic number.

It is an amenable number.

12506135785 is a deficient number, since it is larger than the sum of its proper divisors (5693667095).

12506135785 is a wasteful number, since it uses less digits than its factorization.

12506135785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564289.

The product of its (nonzero) digits is 252000, while the sum is 43.

The spelling of 12506135785 in words is "twelve billion, five hundred six million, one hundred thirty-five thousand, seven hundred eighty-five".