1378805879178 has 128 divisors (see below), whose sum is σ = 3806338314240. Its totient is φ = 360242458560.

The previous prime is 1378805879159. The next prime is 1378805879203. The reversal of 1378805879178 is 8719785088731.

1378805879178 is a `hidden beast` number, since 1 + 37 + 8 + 8 + 0 + 587 + 9 + 1 + 7 + 8 = 666.

It is a super-2 number, since 2×1378805879178² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 785358 + ... + 1836953.

It is an arithmetic number, because the mean of its divisors is an integer number (29737018080).

Almost surely, 2^{1378805879178} is an apocalyptic number.

1378805879178 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1378805879178 is an abundant number, since it is smaller than the sum of its proper divisors (2427532435062).

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

1378805879178 is a wasteful number, since it uses less digits than its factorization.

1378805879178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622449 (or 2622443 counting only the distinct ones).

The product of its (nonzero) digits is 189665280, while the sum is 72.

The spelling of 1378805879178 in words is "one trillion, three hundred seventy-eight billion, eight hundred five million, eight hundred seventy-nine thousand, one hundred seventy-eight".