12878961886 has 32 divisors (see below), whose sum is σ = 23128704000. Its totient is φ = 5261753952.

The previous prime is 12878961871. The next prime is 12878961889. The reversal of 12878961886 is 68816987821.

It is a happy number.

It is a super-2 number, since 2×12878961886² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12878961889) 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, 168696 + ... + 232843.

It is an arithmetic number, because the mean of its divisors is an integer number (722772000).

Almost surely, 2^12878961886 is an apocalyptic number.

12878961886 is a deficient number, since it is larger than the sum of its proper divisors (10249742114).

12878961886 is a wasteful number, since it uses less digits than its factorization.

12878961886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401656.

The product of its digits is 18579456, while the sum is 64.

The spelling of 12878961886 in words is "twelve billion, eight hundred seventy-eight million, nine hundred sixty-one thousand, eight hundred eighty-six".