12729826836 has 240 divisors, whose sum is σ = 35776629504. Its totient is φ = 3937849344.

The previous prime is 12729826819. The next prime is 12729826841. The reversal of 12729826836 is 63862892721.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 65957556 + ... + 65957748.

Almost surely, 2^12729826836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12729826836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17888314752).

12729826836 is an abundant number, since it is smaller than the sum of its proper divisors (23046802668).

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

12729826836 is a wasteful number, since it uses less digits than its factorization.

12729826836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 441 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The spelling of 12729826836 in words is "twelve billion, seven hundred twenty-nine million, eight hundred twenty-six thousand, eight hundred thirty-six".