12940409009285 has 4 divisors (see below), whose sum is σ = 15528490811148. Its totient is φ = 10352327207424.

The previous prime is 12940409009257. The next prime is 12940409009347. The reversal of 12940409009285 is 58290090404921.

It is a Cunningham number, because it is equal to 3597278²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4658543789956 + 8281865219329 = 2158366^2 + 2877823^2 .

It is a cyclic number.

It is not a de Polignac number, because 12940409009285 - 2⁸ = 12940409009029 is a prime.

It is a super-2 number, since 2×12940409009285² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1294040900924 + ... + 1294040900933.

It is an arithmetic number, because the mean of its divisors is an integer number (3882122702787).

Almost surely, 2^{12940409009285} is an apocalyptic number.

It is an amenable number.

12940409009285 is a deficient number, since it is larger than the sum of its proper divisors (2588081801863).

12940409009285 is an equidigital number, since it uses as much as digits as its factorization.

12940409009285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2588081801862.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 12940409009285 in words is "twelve trillion, nine hundred forty billion, four hundred nine million, nine thousand, two hundred eighty-five".