7887048775321 has 27 divisors (see below), whose sum is σ = 8250948230551. Its totient is φ = 7538884365824.

The previous prime is 7887048775273. The next prime is 7887048775327. The reversal of 7887048775321 is 1235778407887.

The square root of 7887048775321 is 2808389.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 4854923085321 + 3032125690000 = 2203389^2 + 1741300^2 .

It is not a de Polignac number, because 7887048775321 - 2²³ = 7887040386713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7887048775327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9203090325 + ... + 9203091181.

Almost surely, 2^{7887048775321} is an apocalyptic number.

7887048775321 is the 2808389-th square number.

7887048775321 is the 1404195-th centered octagonal number.

It is an amenable number.

7887048775321 is a deficient number, since it is larger than the sum of its proper divisors (363899455230).

7887048775321 is an frugal number, since it uses more digits than its factorization.

7887048775321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998 (or 999 counting only the distinct ones).

The product of its (nonzero) digits is 147517440, while the sum is 67.

The spelling of 7887048775321 in words is "seven trillion, eight hundred eighty-seven billion, forty-eight million, seven hundred seventy-five thousand, three hundred twenty-one".