5655655681 has 8 divisors (see below), whose sum is σ = 6105603560. Its totient is φ = 5207836032.

The previous prime is 5655655673. The next prime is 5655655697. The reversal of 5655655681 is 1865565565.

It can be written as a sum of positive squares in 4 ways, for example, as 1280494656 + 4375161025 = 35784^2 + 66145^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5655655681 - 2³ = 5655655673 is a prime.

It is a super-2 number, since 2×5655655681² = 63972882364055147522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5655655651) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 526530 + ... + 537163.

It is an arithmetic number, because the mean of its divisors is an integer number (763200445).

Almost surely, 2^5655655681 is an apocalyptic number.

It is an amenable number.

5655655681 is a deficient number, since it is larger than the sum of its proper divisors (449947879).

5655655681 is a wasteful number, since it uses less digits than its factorization.

5655655681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064115.

The product of its digits is 5400000, while the sum is 52.

The square root of 5655655681 is about 75204.0935122550. The cubic root of 5655655681 is about 1781.6715855858.

The spelling of 5655655681 in words is "five billion, six hundred fifty-five million, six hundred fifty-five thousand, six hundred eighty-one".