7872215015780 has 24 divisors (see below), whose sum is σ = 16758112516152. Its totient is φ = 3105750580992.

The previous prime is 7872215015779. The next prime is 7872215015869. The reversal of 7872215015780 is 875105122787.

It can be written as a sum of positive squares in 4 ways, for example, as 3224085989476 + 4648129026304 = 1795574^2 + 2155952^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2695962587 + ... + 2695965506.

It is an arithmetic number, because the mean of its divisors is an integer number (698254688173).

Almost surely, 2^{7872215015780} is an apocalyptic number.

It is an amenable number.

7872215015780 is an abundant number, since it is smaller than the sum of its proper divisors (8885897500372).

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

7872215015780 is a wasteful number, since it uses less digits than its factorization.

7872215015780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5391928175 (or 5391928173 counting only the distinct ones).

The product of its (nonzero) digits is 2195200, while the sum is 53.

The spelling of 7872215015780 in words is "seven trillion, eight hundred seventy-two billion, two hundred fifteen million, fifteen thousand, seven hundred eighty".