55050061081 has 4 divisors (see below), whose sum is σ = 55061280100. Its totient is φ = 55038842064.

The previous prime is 55050061069. The next prime is 55050061109. The reversal of 55050061081 is 18016005055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18016005055 = 5 ⋅3603201011.

It can be written as a sum of positive squares in 2 ways, for example, as 41314221081 + 13735840000 = 203259^2 + 117200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55050061081 is a prime.

It is a super-2 number, since 2×55050061081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55050091081) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 5602146 + ... + 5611963.

It is an arithmetic number, because the mean of its divisors is an integer number (13765320025).

Almost surely, 2^55050061081 is an apocalyptic number.

It is an amenable number.

55050061081 is a deficient number, since it is larger than the sum of its proper divisors (11219019).

55050061081 is a wasteful number, since it uses less digits than its factorization.

55050061081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11219018.

The product of its (nonzero) digits is 6000, while the sum is 31.

The spelling of 55050061081 in words is "fifty-five billion, fifty million, sixty-one thousand, eighty-one".