12177880378 has 4 divisors (see below), whose sum is σ = 18266820570. Its totient is φ = 6088940188.

The previous prime is 12177880343. The next prime is 12177880391. The reversal of 12177880378 is 87308877121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10474089649 + 1703790729 = 102343^2 + 41277^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3044470093 + ... + 3044470096.

Almost surely, 2^12177880378 is an apocalyptic number.

12177880378 is a deficient number, since it is larger than the sum of its proper divisors (6088940192).

12177880378 is an equidigital number, since it uses as much as digits as its factorization.

12177880378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6088940191.

The product of its (nonzero) digits is 1053696, while the sum is 52.

The spelling of 12177880378 in words is "twelve billion, one hundred seventy-seven million, eight hundred eighty thousand, three hundred seventy-eight".