12944755620 has 72 divisors (see below), whose sum is σ = 40327016184. Its totient is φ = 3358637568.

The previous prime is 12944755619. The next prime is 12944755631. The reversal of 12944755620 is 2655744921.

12944755620 is a `hidden beast` number, since 1 + 2 + 94 + 4 + 7 + 556 + 2 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 645058404 + 12299697216 = 25398^2 + 110904^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 965169 + ... + 978488.

It is an arithmetic number, because the mean of its divisors is an integer number (560097447).

Almost surely, 2^12944755620 is an apocalyptic number.

12944755620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12944755620 is an abundant number, since it is smaller than the sum of its proper divisors (27382260564).

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

12944755620 is a wasteful number, since it uses less digits than its factorization.

12944755620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943709 (or 1943704 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 12944755620 in words is "twelve billion, nine hundred forty-four million, seven hundred fifty-five thousand, six hundred twenty".