5618352581 has 2 divisors, whose sum is σ = 5618352582. Its totient is φ = 5618352580.

The previous prime is 5618352547. The next prime is 5618352637. The reversal of 5618352581 is 1852538165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5156532481 + 461820100 = 71809^2 + 21490^2 .

It is a cyclic number.

It is not a de Polignac number, because 5618352581 - 2⁶ = 5618352517 is a prime.

It is a super-2 number, since 2×5618352581² = 63131771448858723122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5618352521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2809176290 + 2809176291.

It is an arithmetic number, because the mean of its divisors is an integer number (2809176291).

Almost surely, 2^5618352581 is an apocalyptic number.

It is an amenable number.

5618352581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5618352581 is an equidigital number, since it uses as much as digits as its factorization.

5618352581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288000, while the sum is 44.

The square root of 5618352581 is about 74955.6707727974. The cubic root of 5618352581 is about 1777.7458083876.

The spelling of 5618352581 in words is "five billion, six hundred eighteen million, three hundred fifty-two thousand, five hundred eighty-one".