1878834865278 has 32 divisors (see below), whose sum is σ = 4294563888384. Its totient is φ = 536799436992.

The previous prime is 1878834865273. The next prime is 1878834865301. The reversal of 1878834865278 is 8725684388781.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1878834865273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1872501 + ... + 2695167.

It is an arithmetic number, because the mean of its divisors is an integer number (134205121512).

Almost surely, 2^{1878834865278} is an apocalyptic number.

1878834865278 is an abundant number, since it is smaller than the sum of its proper divisors (2415729023106).

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

1878834865278 is a wasteful number, since it uses less digits than its factorization.

1878834865278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877056.

The product of its digits is 1156055040, while the sum is 75.

The spelling of 1878834865278 in words is "one trillion, eight hundred seventy-eight billion, eight hundred thirty-four million, eight hundred sixty-five thousand, two hundred seventy-eight".