12403526505 has 16 divisors (see below), whose sum is σ = 19960361280. Its totient is φ = 6576974528.

The previous prime is 12403526449. The next prime is 12403526507. The reversal of 12403526505 is 50562530421.

It is a cyclic number.

It is not a de Polignac number, because 12403526505 - 2¹¹ = 12403524457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12403526507) 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 15 ways as a sum of consecutive naturals, for example, 2387295 + ... + 2392484.

It is an arithmetic number, because the mean of its divisors is an integer number (1247522580).

Almost surely, 2^12403526505 is an apocalyptic number.

12403526505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12403526505 is a deficient number, since it is larger than the sum of its proper divisors (7556834775).

12403526505 is a wasteful number, since it uses less digits than its factorization.

12403526505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4779960.

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 12403526505 in words is "twelve billion, four hundred three million, five hundred twenty-six thousand, five hundred five".