7720746387872 has 96 divisors (see below), whose sum is σ = 17441401469184. Its totient is φ = 3295616256000.

The previous prime is 7720746387839. The next prime is 7720746387889. The reversal of 7720746387872 is 2787836470277.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 359411372 + ... + 359432852.

It is an arithmetic number, because the mean of its divisors is an integer number (181681265304).

Almost surely, 2^{7720746387872} 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 7720746387872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8720700734592).

7720746387872 is an abundant number, since it is smaller than the sum of its proper divisors (9720655081312).

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

7720746387872 is a wasteful number, since it uses less digits than its factorization.

7720746387872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27862 (or 27854 counting only the distinct ones).

The product of its (nonzero) digits is 309786624, while the sum is 68.

The spelling of 7720746387872 in words is "seven trillion, seven hundred twenty billion, seven hundred forty-six million, three hundred eighty-seven thousand, eight hundred seventy-two".