12717816320 has 120 divisors (see below), whose sum is σ = 33517862532. Its totient is φ = 4624547840.

The previous prime is 12717816317. The next prime is 12717816359. The reversal of 12717816320 is 2361871721.

It can be written as a sum of positive squares in 2 ways, for example, as 11563991296 + 1153825024 = 107536^2 + 33968^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 289232 + ... + 330288.

Almost surely, 2^12717816320 is an apocalyptic number.

12717816320 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 12717816320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16758931266).

12717816320 is an abundant number, since it is smaller than the sum of its proper divisors (20800046212).

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

12717816320 is an equidigital number, since it uses as much as digits as its factorization.

12717816320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41102 (or 41075 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The spelling of 12717816320 in words is "twelve billion, seven hundred seventeen million, eight hundred sixteen thousand, three hundred twenty".