12985965720 has 768 divisors, whose sum is σ = 56525414400. Its totient is φ = 2508226560.

The previous prime is 12985965719. The next prime is 12985965743. The reversal of 12985965720 is 2756958921.

12985965720 is a `hidden beast` number, since 1 + 29 + 8 + 596 + 5 + 7 + 20 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 19295304 + ... + 19295976.

It is an arithmetic number, because the mean of its divisors is an integer number (73600800).

Almost surely, 2^12985965720 is an apocalyptic number.

12985965720 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 12985965720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28262707200).

12985965720 is an abundant number, since it is smaller than the sum of its proper divisors (43539448680).

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

12985965720 is a wasteful number, since it uses less digits than its factorization.

12985965720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 12985965720 in words is "twelve billion, nine hundred eighty-five million, nine hundred sixty-five thousand, seven hundred twenty".