12840668932 has 72 divisors (see below), whose sum is σ = 28547588160. Its totient is φ = 5008207680.

The previous prime is 12840668879. The next prime is 12840668933. The reversal of 12840668932 is 23986604821.

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

It is not an unprimeable number, because it can be changed into a prime (12840668933) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145419 + ... + 216397.

It is an arithmetic number, because the mean of its divisors is an integer number (396494280).

Almost surely, 2^12840668932 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 12840668932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14273794080).

12840668932 is an abundant number, since it is smaller than the sum of its proper divisors (15706919228).

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

12840668932 is a wasteful number, since it uses less digits than its factorization.

12840668932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71081 (or 71072 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 12840668932 in words is "twelve billion, eight hundred forty million, six hundred sixty-eight thousand, nine hundred thirty-two".