12611720000 has 140 divisors (see below), whose sum is σ = 34117154016. Its totient is φ = 4585920000.

The previous prime is 12611719997. The next prime is 12611720021. The reversal of 12611720000 is 2711621.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 425669 + ... + 454331.

Almost surely, 2^12611720000 is an apocalyptic number.

12611720000 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 12611720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17058577008).

12611720000 is an abundant number, since it is smaller than the sum of its proper divisors (21505434016).

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

12611720000 is an equidigital number, since it uses as much as digits as its factorization.

12611720000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28706 (or 28681 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 20.

The spelling of 12611720000 in words is "twelve billion, six hundred eleven million, seven hundred twenty thousand".