5281658642 has 54 divisors (see below), whose sum is σ = 8858849013. Its totient is φ = 2360605104.

The previous prime is 5281658639. The next prime is 5281658693. The reversal of 5281658642 is 2468561825.

It can be written as a sum of positive squares in 2 ways, for example, as 4515974401 + 765684241 = 67201^2 + 27671^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=51389.

It is a super-2 number, since 2×5281658642² = 55791836021226568328, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 78830693 + ... + 78830759.

Almost surely, 2^5281658642 is an apocalyptic number.

5281658642 is a deficient number, since it is larger than the sum of its proper divisors (3577190371).

5281658642 is an equidigital number, since it uses as much as digits as its factorization.

5281658642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280 (or 141 counting only the distinct ones).

The product of its digits is 921600, while the sum is 47.

The square root of 5281658642 is about 72675.0207567910. The cubic root of 5281658642 is about 1741.4998564181.

The spelling of 5281658642 in words is "five billion, two hundred eighty-one million, six hundred fifty-eight thousand, six hundred forty-two".