12978569158 has 8 divisors (see below), whose sum is σ = 19491396552. Its totient is φ = 6481436976.

The previous prime is 12978569137. The next prime is 12978569171. The reversal of 12978569158 is 85196587921.

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

It is a junction number, because it is equal to n+sod(n) for n = 12978569096 and 12978569105.

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, 3921735 + ... + 3925042.

It is an arithmetic number, because the mean of its divisors is an integer number (2436424569).

Almost surely, 2^12978569158 is an apocalyptic number.

12978569158 is a deficient number, since it is larger than the sum of its proper divisors (6512827394).

12978569158 is an equidigital number, since it uses as much as digits as its factorization.

12978569158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7847606.

The product of its digits is 10886400, while the sum is 61.

The spelling of 12978569158 in words is "twelve billion, nine hundred seventy-eight million, five hundred sixty-nine thousand, one hundred fifty-eight".