56016421873 has 2 divisors, whose sum is σ = 56016421874. Its totient is φ = 56016421872.

The previous prime is 56016421717. The next prime is 56016421949. The reversal of 56016421873 is 37812461065.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51126636544 + 4889785329 = 226112^2 + 69927^2 .

It is a cyclic number.

It is not a de Polignac number, because 56016421873 - 2¹⁷ = 56016290801 is a prime.

It is not a weakly prime, because it can be changed into another prime (56016421273) 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 as a sum of consecutive naturals, namely, 28008210936 + 28008210937.

It is an arithmetic number, because the mean of its divisors is an integer number (28008210937).

Almost surely, 2^56016421873 is an apocalyptic number.

It is an amenable number.

56016421873 is a deficient number, since it is larger than the sum of its proper divisors (1).

56016421873 is an equidigital number, since it uses as much as digits as its factorization.

56016421873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 56016421873 in words is "fifty-six billion, sixteen million, four hundred twenty-one thousand, eight hundred seventy-three".