56169756169 has 2 divisors, whose sum is σ = 56169756170. Its totient is φ = 56169756168.

The previous prime is 56169756101. The next prime is 56169756197. The reversal of 56169756169 is 96165796165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55230640144 + 939116025 = 235012^2 + 30645^2 .

It is a cyclic number.

It is not a de Polignac number, because 56169756169 - 2²¹ = 56167659017 is a prime.

It is a super-2 number, since 2×56169756169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56169756569) 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, 28084878084 + 28084878085.

It is an arithmetic number, because the mean of its divisors is an integer number (28084878085).

Almost surely, 2^56169756169 is an apocalyptic number.

It is an amenable number.

56169756169 is a deficient number, since it is larger than the sum of its proper divisors (1).

56169756169 is an equidigital number, since it uses as much as digits as its factorization.

56169756169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18370800, while the sum is 61.

The spelling of 56169756169 in words is "fifty-six billion, one hundred sixty-nine million, seven hundred fifty-six thousand, one hundred sixty-nine".