12856215245 has 12 divisors (see below), whose sum is σ = 15469766676. Its totient is φ = 10256843520.

The previous prime is 12856215209. The next prime is 12856215289. The reversal of 12856215245 is 54251265821.

It can be written as a sum of positive squares in 6 ways, for example, as 770950756 + 12085264489 = 27766^2 + 109933^2 .

It is not a de Polignac number, because 12856215245 - 2⁶ = 12856215181 is a prime.

It is a super-3 number, since 3×12856215245³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 686405 + ... + 704885.

It is an arithmetic number, because the mean of its divisors is an integer number (1289147223).

Almost surely, 2^12856215245 is an apocalyptic number.

It is an amenable number.

12856215245 is a deficient number, since it is larger than the sum of its proper divisors (2613551431).

12856215245 is an frugal number, since it uses more digits than its factorization.

12856215245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19232 (or 18859 counting only the distinct ones).

The product of its digits is 192000, while the sum is 41.

The spelling of 12856215245 in words is "twelve billion, eight hundred fifty-six million, two hundred fifteen thousand, two hundred forty-five".