7980563556 has 135 divisors (see below), whose sum is σ = 24303214089. Its totient is φ = 2276944992.

The previous prime is 7980563477. The next prime is 7980563573. The reversal of 7980563556 is 6553650897.

The square root of 7980563556 is 89334.

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

7980563556 is a `hidden beast` number, since 7 + 9 + 80 + 5 + 6 + 3 + 556 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1064977956 + 6915585600 = 32634^2 + 83160^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 11255730 + ... + 11256438.

Almost surely, 2^7980563556 is an apocalyptic number.

7980563556 is the 89334-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7980563556

7980563556 is an abundant number, since it is smaller than the sum of its proper divisors (16322650533).

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

7980563556 is an equidigital number, since it uses as much as digits as its factorization.

7980563556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448 (or 721 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 54.

The cubic root of 7980563556 is about 1998.3789828400.

It can be divided in two parts, 7980 and 563556, that added together give a square (571536 = 756²).

The spelling of 7980563556 in words is "seven billion, nine hundred eighty million, five hundred sixty-three thousand, five hundred fifty-six".