12178044577 has 24 divisors (see below), whose sum is σ = 13176402624. Its totient is φ = 11227952736.

The previous prime is 12178044539. The next prime is 12178044587. The reversal of 12178044577 is 77544087121.

It is not a de Polignac number, because 12178044577 - 2⁷ = 12178044449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12178044587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6171363 + ... + 6173335.

It is an arithmetic number, because the mean of its divisors is an integer number (549016776).

Almost surely, 2^12178044577 is an apocalyptic number.

It is an amenable number.

12178044577 is a deficient number, since it is larger than the sum of its proper divisors (998358047).

12178044577 is an equidigital number, since it uses as much as digits as its factorization.

12178044577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197 (or 2118 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 46.

The spelling of 12178044577 in words is "twelve billion, one hundred seventy-eight million, forty-four thousand, five hundred seventy-seven".