12402478688865 has 64 divisors (see below), whose sum is σ = 20553109364736. Its totient is φ = 6382813324032.

The previous prime is 12402478688863. The next prime is 12402478688867. The reversal of 12402478688865 is 56888687420421.

12402478688865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12402478688863) and next prime (12402478688867).

It is not a de Polignac number, because 12402478688865 - 2¹ = 12402478688863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12402478688865.

It is not an unprimeable number, because it can be changed into a prime (12402478688863) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16107399 + ... + 16859811.

It is an arithmetic number, because the mean of its divisors is an integer number (321142333824).

Almost surely, 2^{12402478688865} is an apocalyptic number.

12402478688865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12402478688865 is a deficient number, since it is larger than the sum of its proper divisors (8150630675871).

12402478688865 is a wasteful number, since it uses less digits than its factorization.

12402478688865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752798.

The product of its (nonzero) digits is 330301440, while the sum is 69.

The spelling of 12402478688865 in words is "twelve trillion, four hundred two billion, four hundred seventy-eight million, six hundred eighty-eight thousand, eight hundred sixty-five".