5581949858 has 4 divisors (see below), whose sum is σ = 8372924790. Its totient is φ = 2790974928.

The previous prime is 5581949803. The next prime is 5581949909. The reversal of 5581949858 is 8589491855.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2879717569 + 2702232289 = 53663^2 + 51983^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 5581949858.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1395487463 + ... + 1395487466.

Almost surely, 2^5581949858 is an apocalyptic number.

5581949858 is a deficient number, since it is larger than the sum of its proper divisors (2790974932).

5581949858 is a wasteful number, since it uses less digits than its factorization.

5581949858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2790974931.

The product of its digits is 20736000, while the sum is 62.

The square root of 5581949858 is about 74712.4478115929. The cubic root of 5581949858 is about 1773.8979982931.

The spelling of 5581949858 in words is "five billion, five hundred eighty-one million, nine hundred forty-nine thousand, eight hundred fifty-eight".