12836132478 has 64 divisors (see below), whose sum is σ = 30750753600. Its totient is φ = 3945490560.

The previous prime is 12836132471. The next prime is 12836132539. The reversal of 12836132478 is 87423163821.

12836132478 is a `hidden beast` number, since 1 + 2 + 8 + 3 + 613 + 24 + 7 + 8 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12836132471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 707788 + ... + 725696.

It is an arithmetic number, because the mean of its divisors is an integer number (480480525).

Almost surely, 2^12836132478 is an apocalyptic number.

12836132478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12836132478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15375376800).

12836132478 is an abundant number, since it is smaller than the sum of its proper divisors (17914621122).

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

12836132478 is a wasteful number, since it uses less digits than its factorization.

12836132478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18954 (or 18948 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The spelling of 12836132478 in words is "twelve billion, eight hundred thirty-six million, one hundred thirty-two thousand, four hundred seventy-eight".