12878958217 has 8 divisors (see below), whose sum is σ = 13026152000. Its totient is φ = 12732589584.

The previous prime is 12878958181. The next prime is 12878958229. The reversal of 12878958217 is 71285987821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12878958217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12878958017) 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, 174867 + ... + 237352.

It is an arithmetic number, because the mean of its divisors is an integer number (1628269000).

Almost surely, 2^12878958217 is an apocalyptic number.

It is an amenable number.

12878958217 is a deficient number, since it is larger than the sum of its proper divisors (147193783).

12878958217 is a wasteful number, since it uses less digits than its factorization.

12878958217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412575.

The product of its digits is 4515840, while the sum is 58.

The spelling of 12878958217 in words is "twelve billion, eight hundred seventy-eight million, nine hundred fifty-eight thousand, two hundred seventeen".