12381722505 has 32 divisors (see below), whose sum is σ = 22523867520. Its totient is φ = 6450010560.

The previous prime is 12381722497. The next prime is 12381722539. The reversal of 12381722505 is 50522718321.

12381722505 is a `hidden beast` number, since 1 + 2 + 3 + 81 + 72 + 2 + 505 = 666.

It is not a de Polignac number, because 12381722505 - 2³ = 12381722497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12381722505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1060666 + ... + 1072275.

It is an arithmetic number, because the mean of its divisors is an integer number (703870860).

Almost surely, 2^12381722505 is an apocalyptic number.

12381722505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12381722505 is a deficient number, since it is larger than the sum of its proper divisors (10142145015).

12381722505 is a wasteful number, since it uses less digits than its factorization.

12381722505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132998 (or 2132992 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 12381722505 in words is "twelve billion, three hundred eighty-one million, seven hundred twenty-two thousand, five hundred five".