12105178355 has 16 divisors (see below), whose sum is σ = 15501818880. Its totient is φ = 9042711552.

The previous prime is 12105178339. The next prime is 12105178361. The reversal of 12105178355 is 55387150121.

It is a cyclic number.

It is not a de Polignac number, because 12105178355 - 2⁴ = 12105178339 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549890 + ... + 571479.

It is an arithmetic number, because the mean of its divisors is an integer number (968863680).

Almost surely, 2^12105178355 is an apocalyptic number.

12105178355 is a deficient number, since it is larger than the sum of its proper divisors (3396640525).

12105178355 is a wasteful number, since it uses less digits than its factorization.

12105178355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121518.

The product of its (nonzero) digits is 42000, while the sum is 38.

The spelling of 12105178355 in words is "twelve billion, one hundred five million, one hundred seventy-eight thousand, three hundred fifty-five".