12643652215 has 16 divisors (see below), whose sum is σ = 15368827968. Its totient is φ = 9984589056.

The previous prime is 12643652213. The next prime is 12643652221. The reversal of 12643652215 is 51225634621.

It is a cyclic number.

It is not a de Polignac number, because 12643652215 - 2¹ = 12643652213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12643652213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121977 + ... + 200413.

It is an arithmetic number, because the mean of its divisors is an integer number (960551748).

Almost surely, 2^12643652215 is an apocalyptic number.

12643652215 is a deficient number, since it is larger than the sum of its proper divisors (2725175753).

12643652215 is a wasteful number, since it uses less digits than its factorization.

12643652215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78858.

The product of its digits is 86400, while the sum is 37.

The spelling of 12643652215 in words is "twelve billion, six hundred forty-three million, six hundred fifty-two thousand, two hundred fifteen".