56055061081 has 2 divisors, whose sum is σ = 56055061082. Its totient is φ = 56055061080.

The previous prime is 56055061037. The next prime is 56055061091. The reversal of 56055061081 is 18016055065.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42718275856 + 13336785225 = 206684^2 + 115485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56055061081 is a prime.

It is a super-2 number, since 2×56055061081² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56055061081.

It is not a weakly prime, because it can be changed into another prime (56055061001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28027530540 + 28027530541.

It is an arithmetic number, because the mean of its divisors is an integer number (28027530541).

Almost surely, 2^56055061081 is an apocalyptic number.

It is an amenable number.

56055061081 is a deficient number, since it is larger than the sum of its proper divisors (1).

56055061081 is an equidigital number, since it uses as much as digits as its factorization.

56055061081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 37.

The spelling of 56055061081 in words is "fifty-six billion, fifty-five million, sixty-one thousand, eighty-one".