55505560050081 has 6 divisors (see below), whose sum is σ = 80174697850130. Its totient is φ = 37003706700048.

The previous prime is 55505560050079. The next prime is 55505560050107. The reversal of 55505560050081 is 18005006550555.

55505560050081 is a `hidden beast` number, since 5 + 5 + 5 + 0 + 5 + 5 + 60 + 0 + 500 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 55498328078400 + 7231971681 = 7449720^2 + 85041^2 .

It is not a de Polignac number, because 55505560050081 - 2¹ = 55505560050079 is a prime.

It is a super-2 number, since 2×55505560050081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55505560050581) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3083642224996 + ... + 3083642225013.

Almost surely, 2^{55505560050081} is an apocalyptic number.

It is an amenable number.

55505560050081 is a deficient number, since it is larger than the sum of its proper divisors (24669137800049).

55505560050081 is a wasteful number, since it uses less digits than its factorization.

55505560050081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6167284450015 (or 6167284450012 counting only the distinct ones).

The product of its (nonzero) digits is 750000, while the sum is 45.

The spelling of 55505560050081 in words is "fifty-five trillion, five hundred five billion, five hundred sixty million, fifty thousand, eighty-one".