12700128720 has 160 divisors (see below), whose sum is σ = 40049436672. Its totient is φ = 3328528896.

The previous prime is 12700128719. The next prime is 12700128731. The reversal of 12700128720 is 2782100721.

It is a happy number.

It is a super-2 number, since 2×12700128720² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 31 ways as a sum of consecutive naturals, for example, 11946909 + ... + 11947971.

Almost surely, 2^12700128720 is an apocalyptic number.

12700128720 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 12700128720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20024718336).

12700128720 is an abundant number, since it is smaller than the sum of its proper divisors (27349307952).

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

12700128720 is a wasteful number, since it uses less digits than its factorization.

12700128720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889 (or 1883 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 30.

The spelling of 12700128720 in words is "twelve billion, seven hundred million, one hundred twenty-eight thousand, seven hundred twenty".