12505000505 has 16 divisors (see below), whose sum is σ = 15893585424. Its totient is φ = 9412638720.

The previous prime is 12505000493. The next prime is 12505000553. The reversal of 12505000505 is 50500050521.

It can be written as a sum of positive squares in 8 ways, for example, as 4188290089 + 8316710416 = 64717^2 + 91196^2 .

It is not a de Polignac number, because 12505000505 - 2¹² = 12504996409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279485 + ... + 321125.

It is an arithmetic number, because the mean of its divisors is an integer number (993349089).

Almost surely, 2^12505000505 is an apocalyptic number.

It is an amenable number.

12505000505 is a deficient number, since it is larger than the sum of its proper divisors (3388584919).

12505000505 is a wasteful number, since it uses less digits than its factorization.

12505000505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45196.

The product of its (nonzero) digits is 1250, while the sum is 23.

The spelling of 12505000505 in words is "twelve billion, five hundred five million, five hundred five", and thus it is an aban number.