12521606355 has 24 divisors (see below), whose sum is σ = 21813199200. Its totient is φ = 6644626560.

The previous prime is 12521606333. The next prime is 12521606371. The reversal of 12521606355 is 55360612521.

12521606355 is a `hidden beast` number, since 1 + 2 + 5 + 2 + 16 + 0 + 635 + 5 = 666.

12521606355 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 12521606355 - 2⁸ = 12521606099 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 690186 + ... + 708095.

It is an arithmetic number, because the mean of its divisors is an integer number (908883300).

Almost surely, 2^12521606355 is an apocalyptic number.

12521606355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12521606355 is a deficient number, since it is larger than the sum of its proper divisors (9291592845).

12521606355 is a wasteful number, since it uses less digits than its factorization.

12521606355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398491 (or 1398488 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 12521606355 in words is "twelve billion, five hundred twenty-one million, six hundred six thousand, three hundred fifty-five".