12856497839 has 8 divisors (see below), whose sum is σ = 13614195840. Its totient is φ = 12106903896.

The previous prime is 12856497811. The next prime is 12856497851. The reversal of 12856497839 is 93879465821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12856497839 - 2¹² = 12856493743 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 (12856497859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2022749 + ... + 2029094.

It is an arithmetic number, because the mean of its divisors is an integer number (1701774480).

Almost surely, 2^12856497839 is an apocalyptic number.

12856497839 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12856497839 is a deficient number, since it is larger than the sum of its proper divisors (757698001).

12856497839 is a wasteful number, since it uses less digits than its factorization.

12856497839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052029.

The product of its digits is 26127360, while the sum is 62.

The spelling of 12856497839 in words is "twelve billion, eight hundred fifty-six million, four hundred ninety-seven thousand, eight hundred thirty-nine".