12684743680 has 352 divisors, whose sum is σ = 36787046400. Its totient is φ = 4190699520.

The previous prime is 12684743663. The next prime is 12684743723. The reversal of 12684743680 is 8634748621.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54440844 + ... + 54441076.

Almost surely, 2^12684743680 is an apocalyptic number.

12684743680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12684743680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18393523200).

12684743680 is an abundant number, since it is smaller than the sum of its proper divisors (24102302720).

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

12684743680 is an equidigital number, since it uses as much as digits as its factorization.

12684743680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 49.

The spelling of 12684743680 in words is "twelve billion, six hundred eighty-four million, seven hundred forty-three thousand, six hundred eighty".