12856043715 has 32 divisors (see below), whose sum is σ = 21351776256. Its totient is φ = 6600639360.

The previous prime is 12856043713. The next prime is 12856043771. The reversal of 12856043715 is 51734065821.

It is a happy number.

It is not a de Polignac number, because 12856043715 - 2¹ = 12856043713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12856043713) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 106467 + ... + 192476.

It is an arithmetic number, because the mean of its divisors is an integer number (667243008).

Almost surely, 2^12856043715 is an apocalyptic number.

12856043715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12856043715 is a deficient number, since it is larger than the sum of its proper divisors (8495732541).

12856043715 is a wasteful number, since it uses less digits than its factorization.

12856043715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299059.

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 12856043715 in words is "twelve billion, eight hundred fifty-six million, forty-three thousand, seven hundred fifteen".