55217499068161 has 4 divisors (see below), whose sum is σ = 55786751635972. Its totient is φ = 54648246500352.

The previous prime is 55217499068159. The next prime is 55217499068269. The reversal of 55217499068161 is 16186099471255.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41700339456400 + 13517159611761 = 6457580^2 + 3676569^2 .

It is a cyclic number.

It is not a de Polignac number, because 55217499068161 - 2¹ = 55217499068159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55217499068093 and 55217499068102.

It is not an unprimeable number, because it can be changed into a prime (55217499068131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284626283760 + ... + 284626283953.

It is an arithmetic number, because the mean of its divisors is an integer number (13946687908993).

Almost surely, 2^{55217499068161} is an apocalyptic number.

It is an amenable number.

55217499068161 is a deficient number, since it is larger than the sum of its proper divisors (569252567811).

55217499068161 is an equidigital number, since it uses as much as digits as its factorization.

55217499068161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569252567810.

The product of its (nonzero) digits is 32659200, while the sum is 64.

The spelling of 55217499068161 in words is "fifty-five trillion, two hundred seventeen billion, four hundred ninety-nine million, sixty-eight thousand, one hundred sixty-one".