12156876828 has 36 divisors (see below), whose sum is σ = 30736986280. Its totient is φ = 4051355616.

The previous prime is 12156876811. The next prime is 12156876847. The reversal of 12156876828 is 82867865121.

12156876828 is a `hidden beast` number, since 1 + 2 + 1 + 568 + 76 + 8 + 2 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×12156876828² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128763 + ... + 202221.

Almost surely, 2^12156876828 is an apocalyptic number.

12156876828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12156876828 is an abundant number, since it is smaller than the sum of its proper divisors (18580109452).

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

12156876828 is a wasteful number, since it uses less digits than its factorization.

12156876828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78066 (or 78061 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The spelling of 12156876828 in words is "twelve billion, one hundred fifty-six million, eight hundred seventy-six thousand, eight hundred twenty-eight".