12478454166 has 24 divisors (see below), whose sum is σ = 25649666280. Its totient is φ = 4047063552.

The previous prime is 12478454141. The next prime is 12478454213. The reversal of 12478454166 is 66145487421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 751371 + ... + 767798.

It is an arithmetic number, because the mean of its divisors is an integer number (1068736095).

Almost surely, 2^12478454166 is an apocalyptic number.

12478454166 is an abundant number, since it is smaller than the sum of its proper divisors (13171212114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12478454166 is a wasteful number, since it uses less digits than its factorization.

12478454166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519248 (or 1519211 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 48.

The spelling of 12478454166 in words is "twelve billion, four hundred seventy-eight million, four hundred fifty-four thousand, one hundred sixty-six".