56840281321 has 2 divisors, whose sum is σ = 56840281322. Its totient is φ = 56840281320.

The previous prime is 56840281319. The next prime is 56840281411. The reversal of 56840281321 is 12318204865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51266016400 + 5574264921 = 226420^2 + 74661^2 .

It is a cyclic number.

It is not a de Polignac number, because 56840281321 - 2¹ = 56840281319 is a prime.

Together with 56840281319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (56840281621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28420140660 + 28420140661.

It is an arithmetic number, because the mean of its divisors is an integer number (28420140661).

Almost surely, 2^56840281321 is an apocalyptic number.

It is an amenable number.

56840281321 is a deficient number, since it is larger than the sum of its proper divisors (1).

56840281321 is an equidigital number, since it uses as much as digits as its factorization.

56840281321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 56840281321 in words is "fifty-six billion, eight hundred forty million, two hundred eighty-one thousand, three hundred twenty-one".