55565802577681 has 8 divisors (see below), whose sum is σ = 61053334423200. Its totient is φ = 50150953273440.

The previous prime is 55565802577661. The next prime is 55565802577709. The reversal of 55565802577681 is 18677520856555.

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 55565802577681 - 2³³ = 55557212643089 is a prime.

It is a super-2 number, since 2×55565802577681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55565802577681.

It is not an unprimeable number, because it can be changed into a prime (55565802577651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18170633716 + ... + 18170636773.

It is an arithmetic number, because the mean of its divisors is an integer number (7631666802900).

Almost surely, 2^{55565802577681} is an apocalyptic number.

It is an amenable number.

55565802577681 is a deficient number, since it is larger than the sum of its proper divisors (5487531845519).

55565802577681 is a wasteful number, since it uses less digits than its factorization.

55565802577681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36341270639.

The product of its (nonzero) digits is 705600000, while the sum is 70.

The spelling of 55565802577681 in words is "fifty-five trillion, five hundred sixty-five billion, eight hundred two million, five hundred seventy-seven thousand, six hundred eighty-one".