12540366304521 has 8 divisors (see below), whose sum is σ = 18240532806624. Its totient is φ = 7600222002720.

The previous prime is 12540366304507. The next prime is 12540366304537.

12540366304521 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12540366304521 - 2⁶ = 12540366304457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12540366305521) 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 7 ways as a sum of consecutive naturals, for example, 190005550036 + ... + 190005550101.

It is an arithmetic number, because the mean of its divisors is an integer number (2280066600828).

Almost surely, 2^{12540366304521} is an apocalyptic number.

12540366304521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12540366304521 is a deficient number, since it is larger than the sum of its proper divisors (5700166502103).

12540366304521 is a wasteful number, since it uses less digits than its factorization.

12540366304521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380011100151.

The product of its (nonzero) digits is 518400, while the sum is 42.

It can be divided in two parts, 1254036 and 6304521, that added together give a palindrome (7558557).

The spelling of 12540366304521 in words is "twelve trillion, five hundred forty billion, three hundred sixty-six million, three hundred four thousand, five hundred twenty-one".