12758721920 has 480 divisors, whose sum is σ = 39186886320. Its totient is φ = 3964004352.

The previous prime is 12758721889. The next prime is 12758721923. The reversal of 12758721920 is 2912785721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12758721923) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 554727029 + ... + 554727051.

Almost surely, 2^12758721920 is an apocalyptic number.

12758721920 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 12758721920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19593443160).

12758721920 is an abundant number, since it is smaller than the sum of its proper divisors (26428164400).

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

12758721920 is an frugal number, since it uses more digits than its factorization.

12758721920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 56 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 12758721920 in words is "twelve billion, seven hundred fifty-eight million, seven hundred twenty-one thousand, nine hundred twenty".