5581578868 has 6 divisors (see below), whose sum is σ = 9767763026. Its totient is φ = 2790789432.

The previous prime is 5581578853. The next prime is 5581578881. The reversal of 5581578868 is 8688751855.

It can be written as a sum of positive squares in only one way, i.e., 3641881104 + 1939697764 = 60348^2 + 44042^2 .

It is a super-2 number, since 2×5581578868² = 62308045319408322848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697697355 + ... + 697697362.

Almost surely, 2^5581578868 is an apocalyptic number.

It is an amenable number.

5581578868 is a deficient number, since it is larger than the sum of its proper divisors (4186184158).

5581578868 is a wasteful number, since it uses less digits than its factorization.

5581578868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395394721 (or 1395394719 counting only the distinct ones).

The product of its digits is 21504000, while the sum is 61.

The square root of 5581578868 is about 74709.9649845989. The cubic root of 5581578868 is about 1773.8586982268.

The spelling of 5581578868 in words is "five billion, five hundred eighty-one million, five hundred seventy-eight thousand, eight hundred sixty-eight".