12129553178 has 8 divisors (see below), whose sum is σ = 18206004960. Its totient is φ = 6060884860.

The previous prime is 12129553151. The next prime is 12129553181. The reversal of 12129553178 is 87135592121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1941968 + ... + 1948203.

It is an arithmetic number, because the mean of its divisors is an integer number (2275750620).

Almost surely, 2^12129553178 is an apocalyptic number.

12129553178 is a deficient number, since it is larger than the sum of its proper divisors (6076451782).

12129553178 is a wasteful number, since it uses less digits than its factorization.

12129553178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3891732.

The product of its digits is 151200, while the sum is 44.

The spelling of 12129553178 in words is "twelve billion, one hundred twenty-nine million, five hundred fifty-three thousand, one hundred seventy-eight".