12388318362565 has 4 divisors (see below), whose sum is σ = 14865982035084. Its totient is φ = 9910654690048.

The previous prime is 12388318362547. The next prime is 12388318362583. The reversal of 12388318362565 is 56526381388321.

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

It is an interprime number because it is at equal distance from previous prime (12388318362547) and next prime (12388318362583).

It can be written as a sum of positive squares in 2 ways, for example, as 9872471918401 + 2515846444164 = 3142049^2 + 1586142^2 .

It is a cyclic number.

It is not a de Polignac number, because 12388318362565 - 2¹⁵ = 12388318329797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1238831836252 + ... + 1238831836261.

It is an arithmetic number, because the mean of its divisors is an integer number (3716495508771).

Almost surely, 2^{12388318362565} is an apocalyptic number.

It is an amenable number.

12388318362565 is a deficient number, since it is larger than the sum of its proper divisors (2477663672519).

12388318362565 is an equidigital number, since it uses as much as digits as its factorization.

12388318362565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2477663672518.

The product of its digits is 49766400, while the sum is 61.

The spelling of 12388318362565 in words is "twelve trillion, three hundred eighty-eight billion, three hundred eighteen million, three hundred sixty-two thousand, five hundred sixty-five".