12155027656 has 16 divisors (see below), whose sum is σ = 22906368540. Its totient is φ = 6046662720.

The previous prime is 12155027653. The next prime is 12155027663. The reversal of 12155027656 is 65672055121.

It can be written as a sum of positive squares in 2 ways, for example, as 11913722500 + 241305156 = 109150^2 + 15534^2 .

It is not an unprimeable number, because it can be changed into a prime (12155027653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3854715 + ... + 3857866.

Almost surely, 2^12155027656 is an apocalyptic number.

It is an amenable number.

12155027656 is a deficient number, since it is larger than the sum of its proper divisors (10751340884).

12155027656 is a wasteful number, since it uses less digits than its factorization.

12155027656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7712784 (or 7712780 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 40.

The spelling of 12155027656 in words is "twelve billion, one hundred fifty-five million, twenty-seven thousand, six hundred fifty-six".