12939431257585 has 24 divisors (see below), whose sum is σ = 18067609775016. Its totient is φ = 8870188642560.

The previous prime is 12939431257559. The next prime is 12939431257633. The reversal of 12939431257585 is 58575213493921.

It can be written as a sum of positive squares in 4 ways, for example, as 166477056256 + 12772954201329 = 408016^2 + 3573927^2 .

It is not a de Polignac number, because 12939431257585 - 2¹¹ = 12939431255537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6781932 + ... + 8477821.

It is an arithmetic number, because the mean of its divisors is an integer number (752817073959).

Almost surely, 2^{12939431257585} is an apocalyptic number.

It is an amenable number.

12939431257585 is a deficient number, since it is larger than the sum of its proper divisors (5128178517431).

12939431257585 is a wasteful number, since it uses less digits than its factorization.

12939431257585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15263233 (or 15263226 counting only the distinct ones).

The product of its digits is 81648000, while the sum is 64.

The spelling of 12939431257585 in words is "twelve trillion, nine hundred thirty-nine billion, four hundred thirty-one million, two hundred fifty-seven thousand, five hundred eighty-five".