12678435952254 has 96 divisors (see below), whose sum is σ = 28602172520064. Its totient is φ = 4055497917120.

The previous prime is 12678435952229. The next prime is 12678435952267. The reversal of 12678435952254 is 45225953487621.

12678435952254 is a `hidden beast` number, since 1 + 2 + 6 + 7 + 8 + 4 + 3 + 59 + 522 + 54 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12678435952191 and 12678435952200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13775337 + ... + 14666859.

It is an arithmetic number, because the mean of its divisors is an integer number (297939297084).

Almost surely, 2^{12678435952254} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12678435952254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14301086260032).

12678435952254 is an abundant number, since it is smaller than the sum of its proper divisors (15923736567810).

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

12678435952254 is a wasteful number, since it uses less digits than its factorization.

12678435952254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891862 (or 891859 counting only the distinct ones).

The product of its digits is 145152000, while the sum is 63.

The spelling of 12678435952254 in words is "twelve trillion, six hundred seventy-eight billion, four hundred thirty-five million, nine hundred fifty-two thousand, two hundred fifty-four".