12487815401 has 4 divisors (see below), whose sum is σ = 12506261892. Its totient is φ = 12469368912.

The previous prime is 12487815331. The next prime is 12487815407. The reversal of 12487815401 is 10451878421.

12487815401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10717425625 + 1770389776 = 103525^2 + 42076^2 .

It is a cyclic number.

It is not a de Polignac number, because 12487815401 - 2¹⁰ = 12487814377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12487815407) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 9222230 + ... + 9223583.

It is an arithmetic number, because the mean of its divisors is an integer number (3126565473).

Almost surely, 2^12487815401 is an apocalyptic number.

It is an amenable number.

12487815401 is a deficient number, since it is larger than the sum of its proper divisors (18446491).

12487815401 is an equidigital number, since it uses as much as digits as its factorization.

12487815401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18446490.

The product of its (nonzero) digits is 71680, while the sum is 41.

The spelling of 12487815401 in words is "twelve billion, four hundred eighty-seven million, eight hundred fifteen thousand, four hundred one".