12155866792 has 8 divisors (see below), whose sum is σ = 22792250250. Its totient is φ = 6077933392.

The previous prime is 12155866777. The next prime is 12155866799. The reversal of 12155866792 is 29766855121.

It is a happy number.

12155866792 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6558732196 + 5597134596 = 80986^2 + 74814^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12155866799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 759741667 + ... + 759741682.

Almost surely, 2^12155866792 is an apocalyptic number.

It is an amenable number.

12155866792 is a deficient number, since it is larger than the sum of its proper divisors (10636383458).

12155866792 is a wasteful number, since it uses less digits than its factorization.

12155866792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519483355 (or 1519483351 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 52.

The spelling of 12155866792 in words is "twelve billion, one hundred fifty-five million, eight hundred sixty-six thousand, seven hundred ninety-two".