7872328849644 has 768 divisors, whose sum is σ = 25222932725760. Its totient is φ = 2076184535040.

The previous prime is 7872328849573. The next prime is 7872328849657. The reversal of 7872328849644 is 4469488232787.

7872328849644 is a `hidden beast` number, since 7 + 8 + 72 + 3 + 28 + 8 + 496 + 44 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 8312912779 + ... + 8312913725.

It is an arithmetic number, because the mean of its divisors is an integer number (32842360320).

Almost surely, 2^{7872328849644} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7872328849644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12611466362880).

7872328849644 is an abundant number, since it is smaller than the sum of its proper divisors (17350603876116).

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

7872328849644 is a wasteful number, since it uses less digits than its factorization.

7872328849644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227 (or 1219 counting only the distinct ones).

The product of its digits is 1040449536, while the sum is 72.

The spelling of 7872328849644 in words is "seven trillion, eight hundred seventy-two billion, three hundred twenty-eight million, eight hundred forty-nine thousand, six hundred forty-four".