12169544315978 has 8 divisors (see below), whose sum is σ = 20862075970272. Its totient is φ = 5215518992556.

The previous prime is 12169544315947. The next prime is 12169544316011. The reversal of 12169544315978 is 87951344596121.

It is a happy number.

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, 434626582700 + ... + 434626582727.

It is an arithmetic number, because the mean of its divisors is an integer number (2607759496284).

Almost surely, 2^{12169544315978} is an apocalyptic number.

12169544315978 is a deficient number, since it is larger than the sum of its proper divisors (8692531654294).

12169544315978 is an equidigital number, since it uses as much as digits as its factorization.

12169544315978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869253165436.

The product of its digits is 65318400, while the sum is 65.

The spelling of 12169544315978 in words is "twelve trillion, one hundred sixty-nine billion, five hundred forty-four million, three hundred fifteen thousand, nine hundred seventy-eight".