12320717616 has 120 divisors (see below), whose sum is σ = 36167012544. Its totient is φ = 3910809600.

The previous prime is 12320717611. The next prime is 12320717639. The reversal of 12320717616 is 61671702321.

It is a happy number.

12320717616 is a `hidden beast` number, since 1 + 2 + 3 + 20 + 7 + 17 + 616 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (12320717611) 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, 225816 + ... + 275016.

Almost surely, 2^12320717616 is an apocalyptic number.

12320717616 is a gapful number since it is divisible by the number (16) 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 12320717616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18083506272).

12320717616 is an abundant number, since it is smaller than the sum of its proper divisors (23846294928).

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

12320717616 is a wasteful number, since it uses less digits than its factorization.

12320717616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49299 (or 49290 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The spelling of 12320717616 in words is "twelve billion, three hundred twenty million, seven hundred seventeen thousand, six hundred sixteen".