856068720019 has 2 divisors, whose sum is σ = 856068720020. Its totient is φ = 856068720018.

The previous prime is 856068719977. The next prime is 856068720047. The reversal of 856068720019 is 910027860658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 856068720019 - 2¹¹ = 856068717971 is a prime.

It is a super-3 number, since 3×856068720019³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (856068720079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428034360009 + 428034360010.

It is an arithmetic number, because the mean of its divisors is an integer number (428034360010).

Almost surely, 2^856068720019 is an apocalyptic number.

856068720019 is a deficient number, since it is larger than the sum of its proper divisors (1).

856068720019 is an equidigital number, since it uses as much as digits as its factorization.

856068720019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 856068720019 in words is "eight hundred fifty-six billion, sixty-eight million, seven hundred twenty thousand, nineteen".