12505500550505 has 16 divisors (see below), whose sum is σ = 15412357976400. Its totient is φ = 9733901651712.

The previous prime is 12505500550469. The next prime is 12505500550597. The reversal of 12505500550505 is 50505500550521.

It can be written as a sum of positive squares in 8 ways, for example, as 1207546045456 + 11297954505049 = 1098884^2 + 3361243^2 .

It is a cyclic number.

It is not a de Polignac number, because 12505500550505 - 2⁶ = 12505500550441 is a prime.

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, 18666071 + ... + 19324419.

It is an arithmetic number, because the mean of its divisors is an integer number (963272373525).

Almost surely, 2^{12505500550505} is an apocalyptic number.

It is an amenable number.

12505500550505 is a deficient number, since it is larger than the sum of its proper divisors (2906857425895).

12505500550505 is a wasteful number, since it uses less digits than its factorization.

12505500550505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761068.

The product of its (nonzero) digits is 156250, while the sum is 38.

The spelling of 12505500550505 in words is "twelve trillion, five hundred five billion, five hundred million, five hundred fifty thousand, five hundred five".