12002619978 has 24 divisors (see below), whose sum is σ = 26074308000. Its totient is φ = 3990314664.

The previous prime is 12002619961. The next prime is 12002620031. The reversal of 12002619978 is 87991620021.

12002619978 is a `hidden beast` number, since 1 + 20 + 0 + 2 + 619 + 9 + 7 + 8 = 666.

12002619978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 872878 + ... + 886521.

It is an arithmetic number, because the mean of its divisors is an integer number (1086429500).

Almost surely, 2^12002619978 is an apocalyptic number.

12002619978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12002619978 is an abundant number, since it is smaller than the sum of its proper divisors (14071688022).

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

12002619978 is a wasteful number, since it uses less digits than its factorization.

12002619978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759786 (or 1759783 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The spelling of 12002619978 in words is "twelve billion, two million, six hundred nineteen thousand, nine hundred seventy-eight".