12156886838 has 16 divisors (see below), whose sum is σ = 18288737280. Its totient is φ = 6060663336.

The previous prime is 12156886837. The next prime is 12156886867. The reversal of 12156886838 is 83868865121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12156886837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1304945 + ... + 1314227.

It is an arithmetic number, because the mean of its divisors is an integer number (1143046080).

Almost surely, 2^12156886838 is an apocalyptic number.

12156886838 is a deficient number, since it is larger than the sum of its proper divisors (6131850442).

12156886838 is a wasteful number, since it uses less digits than its factorization.

12156886838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11131.

The product of its digits is 4423680, while the sum is 56.

The spelling of 12156886838 in words is "twelve billion, one hundred fifty-six million, eight hundred eighty-six thousand, eight hundred thirty-eight".