12640161792 has 208 divisors, whose sum is σ = 35385120000. Its totient is φ = 4007657472.

The previous prime is 12640161757. The next prime is 12640161797. The reversal of 12640161792 is 29716104621.

It is a self number, because there is not a number n which added to its sum of digits gives 12640161792.

It is not an unprimeable number, because it can be changed into a prime (12640161797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28151584 + ... + 28152032.

Almost surely, 2^12640161792 is an apocalyptic number.

12640161792 is a gapful number since it is divisible by the number (12) 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 12640161792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17692560000).

12640161792 is an abundant number, since it is smaller than the sum of its proper divisors (22744958208).

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

12640161792 is an equidigital number, since it uses as much as digits as its factorization.

12640161792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 12640161792 in words is "twelve billion, six hundred forty million, one hundred sixty-one thousand, seven hundred ninety-two".