55794508561 has 12 divisors (see below), whose sum is σ = 61739464500. Its totient is φ = 50381846240.

The previous prime is 55794508519. The next prime is 55794508621. The reversal of 55794508561 is 16580549755.

It can be written as a sum of positive squares in 2 ways, for example, as 19914572161 + 35879936400 = 141119^2 + 189420^2 .

It is a de Polignac number, because none of the positive numbers 2^k-55794508561 is a prime.

It is a super-2 number, since 2×55794508561² (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 (55794508061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1529326 + ... + 1565383.

It is an arithmetic number, because the mean of its divisors is an integer number (5144955375).

Almost surely, 2^55794508561 is an apocalyptic number.

It is an amenable number.

55794508561 is a deficient number, since it is larger than the sum of its proper divisors (5944955939).

55794508561 is a wasteful number, since it uses less digits than its factorization.

55794508561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3094880 (or 3094869 counting only the distinct ones).

The product of its (nonzero) digits is 7560000, while the sum is 55.

The spelling of 55794508561 in words is "fifty-five billion, seven hundred ninety-four million, five hundred eight thousand, five hundred sixty-one".