12979223206578 has 160 divisors (see below), whose sum is σ = 31643691133824. Its totient is φ = 3959659012608.

The previous prime is 12979223206559. The next prime is 12979223206583. The reversal of 12979223206578 is 87560232297921.

12979223206578 is a `hidden beast` number, since 1 + 2 + 9 + 7 + 9 + 22 + 32 + 0 + 6 + 578 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 188171125 + ... + 188240087.

Almost surely, 2^{12979223206578} is an apocalyptic number.

12979223206578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12979223206578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15821845566912).

12979223206578 is an abundant number, since it is smaller than the sum of its proper divisors (18664467927246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12979223206578 is a wasteful number, since it uses less digits than its factorization.

12979223206578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70878 (or 70869 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 63.

The spelling of 12979223206578 in words is "twelve trillion, nine hundred seventy-nine billion, two hundred twenty-three million, two hundred six thousand, five hundred seventy-eight".