56021722061 has 2 divisors, whose sum is σ = 56021722062. Its totient is φ = 56021722060.

The previous prime is 56021721991. The next prime is 56021722063. The reversal of 56021722061 is 16022712065.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36244925161 + 19776796900 = 190381^2 + 140630^2 .

It is a cyclic number.

It is not a de Polignac number, because 56021722061 - 2³⁴ = 38841852877 is a prime.

Together with 56021722063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56021722063) 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, 28010861030 + 28010861031.

It is an arithmetic number, because the mean of its divisors is an integer number (28010861031).

Almost surely, 2^56021722061 is an apocalyptic number.

It is an amenable number.

56021722061 is a deficient number, since it is larger than the sum of its proper divisors (1).

56021722061 is an equidigital number, since it uses as much as digits as its factorization.

56021722061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 56021722061 in words is "fifty-six billion, twenty-one million, seven hundred twenty-two thousand, sixty-one".