378784123918 has 32 divisors (see below), whose sum is σ = 633696998400. Its totient is φ = 168753538944.

The previous prime is 378784123889. The next prime is 378784123933. The reversal of 378784123918 is 819321487873.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 741571 + ... + 1143457.

It is an arithmetic number, because the mean of its divisors is an integer number (19803031200).

Almost surely, 2^378784123918 is an apocalyptic number.

378784123918 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

378784123918 is a deficient number, since it is larger than the sum of its proper divisors (254912874482).

378784123918 is a wasteful number, since it uses less digits than its factorization.

378784123918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403384.

The product of its digits is 16257024, while the sum is 61.

The spelling of 378784123918 in words is "three hundred seventy-eight billion, seven hundred eighty-four million, one hundred twenty-three thousand, nine hundred eighteen".