12313562778 has 48 divisors (see below), whose sum is σ = 29891418336. Its totient is φ = 3630532320.

The previous prime is 12313562713. The next prime is 12313562801. The reversal of 12313562778 is 87726531321.

12313562778 is a `hidden beast` number, since 1 + 2 + 3 + 13 + 5 + 627 + 7 + 8 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 833076 + ... + 847727.

It is an arithmetic number, because the mean of its divisors is an integer number (622737882).

Almost surely, 2^12313562778 is an apocalyptic number.

12313562778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12313562778 is an abundant number, since it is smaller than the sum of its proper divisors (17577855558).

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

12313562778 is a wasteful number, since it uses less digits than its factorization.

12313562778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680859 (or 1680856 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The spelling of 12313562778 in words is "twelve billion, three hundred thirteen million, five hundred sixty-two thousand, seven hundred seventy-eight".