123568134778 has 8 divisors (see below), whose sum is σ = 202202402400. Its totient is φ = 56167333980.

The previous prime is 123568134769. The next prime is 123568134841. The reversal of 123568134778 is 877431865321.

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

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 3 ways as a sum of consecutive naturals, for example, 2808366678 + ... + 2808366721.

It is an arithmetic number, because the mean of its divisors is an integer number (25275300300).

Almost surely, 2^123568134778 is an apocalyptic number.

123568134778 is a deficient number, since it is larger than the sum of its proper divisors (78634267622).

123568134778 is a wasteful number, since it uses less digits than its factorization.

123568134778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5616733412.

The product of its digits is 6773760, while the sum is 55.

The spelling of 123568134778 in words is "one hundred twenty-three billion, five hundred sixty-eight million, one hundred thirty-four thousand, seven hundred seventy-eight".