12691356004839 has 4 divisors (see below), whose sum is σ = 16921808006456. Its totient is φ = 8460904003224.

The previous prime is 12691356004763. The next prime is 12691356004843. The reversal of 12691356004839 is 93840065319621.

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

It is not a de Polignac number, because 12691356004839 - 2³² = 12687061037543 is a prime.

It is a super-2 number, since 2×12691356004839² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12691356002839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2115226000804 + ... + 2115226000809.

It is an arithmetic number, because the mean of its divisors is an integer number (4230452001614).

Almost surely, 2^{12691356004839} is an apocalyptic number.

12691356004839 is a deficient number, since it is larger than the sum of its proper divisors (4230452001617).

12691356004839 is an equidigital number, since it uses as much as digits as its factorization.

12691356004839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4230452001616.

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 12691356004839 in words is "twelve trillion, six hundred ninety-one billion, three hundred fifty-six million, four thousand, eight hundred thirty-nine".