12278381854 has 16 divisors (see below), whose sum is σ = 19014399360. Its totient is φ = 5940305280.

The previous prime is 12278381831. The next prime is 12278381879. The reversal of 12278381854 is 45818387221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12278381798 and 12278381807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 795442 + ... + 810730.

It is an arithmetic number, because the mean of its divisors is an integer number (1188399960).

Almost surely, 2^12278381854 is an apocalyptic number.

12278381854 is a deficient number, since it is larger than the sum of its proper divisors (6736017506).

12278381854 is a wasteful number, since it uses less digits than its factorization.

12278381854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28275.

The product of its digits is 860160, while the sum is 49.

The spelling of 12278381854 in words is "twelve billion, two hundred seventy-eight million, three hundred eighty-one thousand, eight hundred fifty-four".