12861817946 has 8 divisors (see below), whose sum is σ = 19525169664. Its totient is φ = 6353428060.

The previous prime is 12861817933. The next prime is 12861817963. The reversal of 12861817946 is 64971816821.

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, 38740250 + ... + 38740581.

It is an arithmetic number, because the mean of its divisors is an integer number (2440646208).

Almost surely, 2^12861817946 is an apocalyptic number.

12861817946 is a deficient number, since it is larger than the sum of its proper divisors (6663351718).

12861817946 is an equidigital number, since it uses as much as digits as its factorization.

12861817946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77480916.

The product of its digits is 1161216, while the sum is 53.

The spelling of 12861817946 in words is "twelve billion, eight hundred sixty-one million, eight hundred seventeen thousand, nine hundred forty-six".