5978818561 has 2 divisors, whose sum is σ = 5978818562. Its totient is φ = 5978818560.

The previous prime is 5978818501. The next prime is 5978818577. The reversal of 5978818561 is 1658188795.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3969000000 + 2009818561 = 63000^2 + 44831^2 .

It is a cyclic number.

It is not a de Polignac number, because 5978818561 - 2¹⁵ = 5978785793 is a prime.

It is a super-2 number, since 2×5978818561² = 71492542770716221442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5978818496 and 5978818505.

It is not a weakly prime, because it can be changed into another prime (5978818501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2989409280 + 2989409281.

It is an arithmetic number, because the mean of its divisors is an integer number (2989409281).

Almost surely, 2^5978818561 is an apocalyptic number.

It is an amenable number.

5978818561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5978818561 is an equidigital number, since it uses as much as digits as its factorization.

5978818561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4838400, while the sum is 58.

The square root of 5978818561 is about 77322.8204413160. The cubic root of 5978818561 is about 1814.9797811599.

The spelling of 5978818561 in words is "five billion, nine hundred seventy-eight million, eight hundred eighteen thousand, five hundred sixty-one".