12683291640 has 128 divisors (see below), whose sum is σ = 39363563520. Its totient is φ = 3265920000.

The previous prime is 12683291639. The next prime is 12683291651. The reversal of 12683291640 is 4619238621.

It is a junction number, because it is equal to n+sod(n) for n = 12683291592 and 12683291601.

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, 1808140 + ... + 1815140.

It is an arithmetic number, because the mean of its divisors is an integer number (307527840).

Almost surely, 2^12683291640 is an apocalyptic number.

12683291640 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 12683291640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19681781760).

12683291640 is an abundant number, since it is smaller than the sum of its proper divisors (26680271880).

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

12683291640 is a wasteful number, since it uses less digits than its factorization.

12683291640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7533 (or 7529 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 12683291640 in words is "twelve billion, six hundred eighty-three million, two hundred ninety-one thousand, six hundred forty".