12519743805 has 64 divisors (see below), whose sum is σ = 22835312640. Its totient is φ = 6504307200.

The previous prime is 12519743791. The next prime is 12519743813. The reversal of 12519743805 is 50834791521.

12519743805 is a `hidden beast` number, since 1 + 25 + 197 + 438 + 0 + 5 = 666.

12519743805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12519743805 - 2⁶ = 12519743741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4775395 + ... + 4778015.

It is an arithmetic number, because the mean of its divisors is an integer number (356801760).

Almost surely, 2^12519743805 is an apocalyptic number.

12519743805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12519743805 is a deficient number, since it is larger than the sum of its proper divisors (10315568835).

12519743805 is a wasteful number, since it uses less digits than its factorization.

12519743805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3539 (or 3533 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 12519743805 in words is "twelve billion, five hundred nineteen million, seven hundred forty-three thousand, eight hundred five".