56000005081 has 2 divisors, whose sum is σ = 56000005082. Its totient is φ = 56000005080.

The previous prime is 56000005069. The next prime is 56000005097. The reversal of 56000005081 is 18050000065.

56000005081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49195240000 + 6804765081 = 221800^2 + 82491^2 .

It is a cyclic number.

It is not a de Polignac number, because 56000005081 - 2⁵ = 56000005049 is a prime.

It is a super-2 number, since 2×56000005081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56000005381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28000002540 + 28000002541.

It is an arithmetic number, because the mean of its divisors is an integer number (28000002541).

Almost surely, 2^56000005081 is an apocalyptic number.

It is an amenable number.

56000005081 is a deficient number, since it is larger than the sum of its proper divisors (1).

56000005081 is an equidigital number, since it uses as much as digits as its factorization.

56000005081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 56000005081 in words is "fifty-six billion, five thousand, eighty-one".